White Forest and Dark Plains biomes do not generate when using Tectonic. Mod found here: https://www.curseforge.com/minecraft/mc-mods/tectonic

Tectonic is stunning, and it'd be incredible to see vast expanses of contaminated territory, with skirmishes between the two natural enemies.

Will test datapack version of Tectonic shortly and report my findings, as the datapack may be compatible.

Both the mod and datapack versions do not generate goo biomes. Consider this a non-urgent feature request for somewhere down the line.

trying to look into something similar with seeing about how commonly latex biomes spawn, since ive been playing with the mod for a while now and have only ever seen one once, that being when i spawned inside of if, and my hardcore run came swiftly to an end