I found this underwater cave with dripstone in it. The dripstone isn't waterlogged.

They do seem to be waterlogged when they're spawned in open water areas.

I hope this will help with the development!

Seed: 6101765940395407858

Coordinates: /execute in minecraft:overworld run tp @s 139.17 -3.76 -500.00 -388.35 60.60