For the first time ever, you can now finally play with 1.21's Trial Chambers on 1.20 thanks to Faithful Chambers, a datapack that ports the 1.21 structure back via substituing the missing blocks and mechanics with those found in the mod:
Which, of course, makes it a required dependency!
You'll also need...
Or the Chambers won't spawn properly!
The new trial chambers are under the namespace minecraft:trial_chambers, NOT trials:trials_chambers!
We've even gone to the liberty of removing the Trials Chambers from generating, so only the Faithful Chambers remain. You can revert this change by removing the trials folder from the datapack if you want to!
This project is born of the collaberation between Nekomaster, Calcyon, and DeadlyDiamond98 for the Resurvival modpack! You should check that out!
Otherwise, hope you enjoy playing with this!!