As reported on CurseForge comments world gen creates very large River biomes surrounding each landmass biome. Essentially creating large 1-2 biome islands each surround by water. See attachment, all water areas are Minecraft:River biomes.

Also any hope of a config file for Fabric? :)

Lovely biome work,
Thanks in advance

Have you ensured you're on the latest? I believe I've patched this issue

Ah, yes indeed. Now fixed in 0.9.3
I was using 0.9.2 release yesterday.

Thanks for the quick fix!

Any ETA on config options for Fabric? A list of biomes with enable/disable would be a nice start.