custom biome troubles

I'm making a world based off east asia using worldpainter and have been trying to make custom biomes that are duplicates of vanilla biomes for the countries so I can change the spawn tags of the mobs from untamedwilds to match their real world range, but the custom biome duplicates aren't working. I've double checked spelling on everything and the proper file order but still nothing is working. 
The biomes are not supposed to spawn naturally but instead just be assigned to areas I have painted in worldpainter, and I've done this before for the same minecraft version just altering vanilla biomes and that worked just fine and I did it almost the same way, with the exception that instead of minecraft:jungle, it's eastasia:jungle_java, etc. I've painted it that way using terralith before so I know that works on worldpainter's end but they just don't appear ingame for some reason.
I used misode for the generation to basically just copy the jungle preset and made sure I had the misode preset on the correct mc version. I also once had a bug the last time I did this where I had to move the carvers under spawncosts for some reason so I tried that too just in case and still it won't work.
Also yes there is more than just jungle_java but I'm trying to make it work for just that for now