This data pack changes sulfur caves generation so that they generate as islands in the middle of the ocean, like mushroom islands.
Regular sulfur caves will not generate anymore, but the caves underneath sulfur islands will have generation somewhat similar to vanilla sulfur caves.
Sulfur islands will replace mushroom islands in warmer oceans, while mushroom islands continue to generate in cooler oceans. If an island generates across a temperature border a strip of the stony shores biome will generate to make a less awkward transition.
To make them match the mushroom islands, sulfur islands won't spawn any hostile mobs, and the biome's feature of naturally spawning cave spiders is moved to dripstone caves. Stony shores have also been changed to pervent hostile mob spawning.
Its possible this datapack will not function with other datapacks or mods that change the biomes of the overworld, due to it changing the biome generation through the overworld.json file in data/minecraft/dimension.