It’S ALIVEE
Hi so as it turns out!! the stationapi biome stuff is not set up properly!
The getBiome(ChunkPos) method isn’t overwritten by NetherBiomeSourceImpl so it was just returning Biome.HELL no matter where I went!
After mixing into that to make it actually use the system it’s meant to i was able to get ash slimes spawning in the igneum pools!!