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All of the Adventures in the Forgotten Realms Class Challenge decks are forgeable:

Adventures in the Forgotten Realms Class Challenge: Barbarian; Bard; Cleric; Druid; Fighter; Monk; Paladin; Ranger; Rogue; Sorcerer (AFR Class Challenge); Warlock; Wizard

All 4 of the Forgotten Realms Commander decks are made forgeable by the new version, 1.6.44:

Forgotten Realms Commander Deck: Aura of Courage; Draconic Rage; Dungeons of Death; Planar Portal

All 4 of the 2021 Pioneer Challenger Decks are forgeable:

Pioneer Challenger Decks 2021: Azorius Spirits; Lotus Field Combo; Mono-Red Burn; Orzhov Auras

Both Innistrad: Midnight Hunt Commander decks are made forgeable by the new version, 1.6.45:

Innistrad: Midnight Hunt Commander Deck: Coven Counters; Undead Unleashed

The Secret Lair Secretversary commander deck is forgeable:

Secret Lair Secretversary: Heads I Win, Tails You Lose

All 12 magic online Modern Banned Gauntlet decks and both Innistrad: Crimson Vow commander decks are forgeable:

Modern Banned Gauntlet: Affinity (Modern Banned Gauntlet); Bant Stoneblade (Modern Banned Gauntlet); Bloom Titan (Modern Banned Gauntlet); Blue-Red Aggro (Modern Banned Gauntlet); Counter-Cat (Modern Banned Gauntlet); Dredge (Modern Banned Gauntlet); Eldrazi Aggro (Modern Banned Gauntlet); Jund (Modern Banned Gauntlet); Melira Pod (Modern Banned Gauntlet); Sunny Side Up (Modern Banned Gauntlet); Temur Aggor (Modern Banned Gauntlet); Twin Exarch (Modern Banned Gauntlet)
Innistrad: Crimson Vow Commander Deck: Spirit Squadron; Vampiric Bloodline

1 of the 2022 Challenger Decks is forgeable:

Challenger Decks 2022: Mono White Aggro

The remaining 3 2002 Challenger Decks, as well as the sideboard from Mono White Aggro, are made forgeable by the new version, 1.6.49.
Both Neon Dynasty commander decks, as well as the corrected version of Upgrades Unleashed, are made forgeable by the new version, 1.6.49.
All 75 magic online Super Jump! 20-packets are forgeable.

Challenger Decks 2022: Dimir Control; Gruul Stompy; Mono White Aggro; Rakdos Vampires
Super Jump!: Aggro 1; Aggro 2; Angels 1; Artifacts 1; Artifacts 2; Artifacts 3; Artifacts 4; Artifacts 5; Blink 1; Blink 2; Blink 3; Bloodbraid 1; Burn 1; Burn 2; Counters 1; Counters 2; Counters 3; Counters 4; Cycling 1; Death's Shadow (Super Jump!); Devotion 1; Discard 1; Discard 2; Dragons 1; Dragons 2; Dragons 3; Drawing Cards 1; Drawing Cards 2; Elves 1; Elves 2; Enchantments 1; Enchantments 2; Enchantments 3; Enchantments 4; Equipment 1; Faeries 1; Goblins 1; Kiki Copy; Lifegain 1; Lifegain 2; Lifegain 3; Magecraft 1; Mill 1; Mill 2; Mill 3; Ninjas 1; Ramp 1; Ramp 2; Ramp 3; Reanimator 1; Reanimator 2; Sacrifice 1; Sacrifice 2; Sacrifice 3; Sacrifice 4; Sacrifice 5; Sacrifice 6; Spellcast 1; Spellcast 2; Spellcast 3; Spellcast 4; Spellcast 5; Squirrels 1; Stompy 1; Stuffy Doll; Tapout 1; Tapout 2; Tapout 3; Tapout 4; Tempo 1; Tempo 2; Tempo 3; Tokens 1; Tokens 2; Zombies 1
Kamigawa: Neon Dynasty Commander Deck: Power Up; Upgrades Unleashed; Upgrades Unleashed (corrected)

3 Streets of New Capenna commander decks and both Magic: The Gathering 2022 Starter Kits are forgeable:

Magic: The Gathering 2022 Starter Kit: Red-Green Starter Deck; White-Blue Starter Deck
Streets of New Capenna Commander Deck: Bedecked Brokers; Maestros Massacre; Obscura Operation

Warhammer 40,000 (edition name 40K) : the 4 Preconstructed Commander decks
Forces of the Imperium
Necron Dynasties
The Ruinous Power
Tyranid Swarm

30 new and old decks, including the Starter Commander decks, are forgeable:

Starter Commander Deck: Chaos Incarnate; Draconic Destruction; First Flight; Grave Danger (SCD); Token Triumph
Pioneer Challenger Deck 2022: Dimir Control (Pioneer Challenger); Gruul Stompy (Pioneer Challenger); Izzet Phoenix; Orzhov Humans
Challenger Decks 2019 Japan: Awakening Earth; Song Dance
Core Set 2020 Welcome Deck: Black Deck; Blue Deck; Green Deck; Red Deck; White Deck
Magic 2015 Clash Pack: Fate and Fury
Born of the Gods Intro Pack: Insatiable Hunger
Duel Decks: Mirrodin Pure vs. New Phyrexia: Mirrodin Pure; New Phyrexia
Starter 2000: Player A's advanced pack (S00); Player A's deck (S00); Player B's advanced pack (S00); Player B's deck (S00)
Starter 1999: Preconstructed deck 1 (S99); Preconstructed deck 2 (S99)
Portal Second Age Starter Deck: Preconstructed deck 1 (P02); Preconstructed deck 2 (P02)
Introductory Two-Player Set: Kazz's Second Deck (ITP); Zakk's Second Deck (ITP)

161 WotC Preconstructed decks, including 15 commander decks, are made forgeable by the new version, 1.6.55:

Phyrexia: All Will Be One Commander: Corrupting Influence; Rebellion Rising
Jumpstart 2022: Blink 1 (J22); Blink 2 (J22); Blink 3 (J22); Blink 4; Boneyard 1; Boneyard 2; Cats 1; Cats 2; Cats 3; Cats 4; Constellation 1; Constellation 2; Cruel 1; Cruel 2; Cruel 3; Cruel 4; Cycling 1 (J22); Cycling 2; Demons 1; Demons 2; Detective 1; Detective 2; Detective 3; Detective 4; Dragons 1 (J22); Dragons 2 (J22); Eldrazi (J22); Elves 1 (J22); Elves 2 (J22); Elves 3; Elves 4; Experimental 1; Experimental 2; Faeries 1 (J22); Faeries 2; Fangs 1; Fangs 2; Fangs 3; Fangs 4; Ferocious 1; Ferocious 2; Ferocious 3; Ferocious 4; Fiery 1; Fiery 2; Fiery 3; Fiery 4; Gigantic 1; Gigantic 2; Go to School 1; Go to School 2; Goblins 1 (J22); Goblins 2; Goblins 3; Goblins 4; Gross 1; Gross 2; Gross 3; Gross 4; Holy 1; Holy 2; Holy 3; Holy 4; Insects 1; Insects 2; Insects 3; Insects 4; Inventive 1; Inventive 2; Inventive 3; Inventive 4; Knights (J22); Landfall 1; Landfall 2; Law 1; Law 2; Law 3; Law 4; Merfolk 1; Merfolk 2; Merfolk 3; Merfolk 4; Morbid 1; Morbid 2; Multi-Headed 1; Multi-Headed 2; Primates; Raid 1; Raid 2; Raid 3; Raid 4; Rats (J22); Scrying 1; Scrying 2; Shapeshifters; Snow; Speedy; Spicy; Spirits 1; Spirits 2; Teamwork 1; Teamwork 2; Think Again 1; Think Again 2; Think Again 3; Think Again 4; Treasure 1; Treasure 2; Treasure 3; Treasure 4; Unlucky Thirteen; Urza's; Vehicles; Wolves 1; Wolves 2; Wolves 3; Wolves 4; Zombies 1 (J22); Zombies 2; Zombies 3; Zombies 4
The Brothers' War Commander: Mishra's Burnished Banner; Urza's Iron Alliance
The Brothers' War Jumpstart: Infantry 1; Infantry 2; Powerstones 1; Powerstones 2; Titanic 1; Titanic 2; Unearthed 1; Unearthed 2; Welded 1; Welded 2
Game Night: Free-for-All: Boundless Elves; Dark Sacrifice (Game Night); Draconic Fury; Glorious Combat; Political Trickery
Warhammer 40,000 Commander: Forces of the Imperium; Necron Dynasties; Tyranid Swarm
Dominaria United Commander: Legends' Legacy; Painbow
Dominaria United Jumpstart: Arcane Mischief; Beast Territory; Coalition Corps; Coalition Legion; Monster Territory; Mystic Mischief; Ready to Attack; Ready to Charge; Totally Merciless; Totally Ruthless
Commander Legends: Baldur's Gate Commander: Draconic Dissent; Exit from Exile; Mind Flayarrrs; Party Time
Streets of New Capenna Commander: Cabaretti Cacophony; Riveteers Rampage

All Streets of New Capenna and Adventures in the Forgotten Realms starter decks are forgeable:

Streets of New Capenna Starter Deck: Earth Shakers; Up and Away
Adventures in the Forgotten Realms Starter Deck: Rough and Tumble; Sneak Attack (AFR)

26 WotC Preconstructed decks, including 4 commander decks, are forgeable;

March of the Machine Commander: Call for Backup; Cavalry Charge; Divine Convocation; Tinker Time
March of the Machine Jumpstart: Brood 1; Brood 2; Buff 1; Buff 2; Expendable 1; Expendable 2; Overachiever 1; Overachiever 2; Reinforcement 1; Reinforcement 2
Phyrexia: All Will Be One Jumpstart: Corruption 1; Corruption 2; Mite-y 1; Mite-y 2; Progress 1; Progress 2; Rebellious 1; Rebellious 2; Toxic 1; Toxic 2
Core Set 2021 Arena Starter Kit: Mono Black; Mono Green

Just wanted to say thank you for this!