Biomes in custom demsions

I am using mcreator for modding. I have made a custom demension and added two biomes a mythic one and a dark plains one. Only one of them is spawning and I can't figure out way

these are the stats for them

it didn't work

stats for my first biome:

biome temp range: 0 0.5

humid rang: 0 0.5

contenaentalesss: 0 1

erosion range: -0.5 0.5

weirdness range -1 1

statsfor my second biome in same order:

-0.3 0

0.5 1

-1 0

-0.6 0.5

-0.5 0