I have explored a lot and couldnt find any dungeon spawning, i hadnt change anything in the config so i guess some of those mods should be causing a weird interaction
Still came here to ask.

Mods that modify biomes:
Terralith
Biomes o Plenty

It works for me. What happens when you run the command /locate structure dungeoncrawl:dungeon with cheats on?

ok now they seem to spawn incredibly rarely
I already tried the same modpack without those two mods terralith and biomes o plenty and i found them far more often
so it must be something with one of those.