Hello Aternos team!
Link to the mod: https://www.curseforge.com/minecraft/mc-mods/superflat-caves
This mod's main purpose is to add more tags to superflat world creation presets that allow caves and ravines to generate , allowing accurate ore and cave generation just like overworld, very useful if you are trying to do a superflat survival map, or a world similar to stoneblock but with ores.
Usage
Simply add "caves" and/or "ravines" to your superflat preset and they should generate.
This Also allows other mods who modify cave generation, to generate their own caves in super flat presets.