Hi

It would be nice with a config to blacklist certain biomes from generating dungeons. I think it looks weird with spider dungeons spawning in oceans:

I'm sure that's possible with datapacks

since 1.18.2 you have to use Datapacks of course

Starting with 1.18, I believe this should no longer happen since structures get to specify exactly which biomes they spawn in. Note that there is still a chance structures spawn in water, if the water is still technically in a non-ocean biome - this behavior is intended and there's no plan to change it atm.