Help turning world generation into ocean islands

Hi! So, I spent WAY too long figuring out how to get a world to generate with the biomes I wanted, and it looks great! My problem is, I’m having a terrible time trying to figure out how to make the landmasses generate as islands without having half the biome underwater and the ocean floors above water with the biome painted on. I’ve been referencing other ocean island datapacks, but I’m still stumped. It’s been actual weeks of on and off work to find a solution. What do I need to edit in the config to make the land biomes generate as islands? I know it has something to do with the continentalness and erosion, but I have no clue what values to edit or what they do in order to get islands. Every solution I’ve seen isn’t specific enough to understand. I may be a little stupid.