How do I make the entire world an ocean?
In Minecraft Java 1.19.2, I've tried using the Lukewarm Ocean Single Biome world type, but all it does is consider the whole world as a Lukewarm Ocean biome while still generating islands.
So what you want to do is go on to more world options on the create world. click on the top right button till you see superflat. click on the customise button, click on presets and select water world