Biomes You'll Go stops Quark Myalite structures and Chorus vegetation from generating in the End.

My best guess is that BYG is taking control of the End worldgen after Quark adds structures, and resetting the vanilla biomes- so maybe adding a datapack of Quark's End worldgen on top would work? But I am unsure how to properly create such a datapack.

Minecraft 1.18.2
Forge 40.2.0
Quark 3.2-358
BYG 1.18.2-1.4.7

latest.log

You can add the BYG biomes to the config to ensure the load

Thanks for your reply, but I'm realizing maybe I wasn't clear enough- my expectation isn't for these features to generate in modded biomes; at the moment they do not generate in the vanilla End biomes (minecraft:end_highlands etc) as expected due to some interference with BYG.

I have tried adding BYG biomes to the config for myalite features with no change, and chorus vegetation has no biome whitelist.