Me and my friends are trying to get into a "Ocean only" world, but once we create any type of ocean world, we get this world where we spawn above sea level. But the water structures are still generated.

It also affects older versions of worlds, i tried strating a world in 1.17.1 in single biome ocean, then updated the world to version 1.19.2 and the newly generated chunks were all above sea level.

in following picture you can see 2 structure normally generated under water.