This is module for fabric-carpet which will enable you to create superflat worlds with all the biomes. Currently only tested in 1.19.
Check out some examples of what you can expect here (small gallery).
Grab release file and put it into your Minecraft mod folder. Make sure you have CarpetMod as well.
Go create new world and in More World Options choose World Type: SuperFlat with Biomes.
SuperFlat with Biomes comes with following config options. You can set them using in-game chat or with carpet config file.
/superflatbiomes generateFeatures true/false Defaults to false, will generate all land features. Has no effect on other configuration options.
/superflatbiomes generateAllStructures true/false Defaults to false, will generate all structures in full, bounding box and blocks. If true, will spawn villages and strongholds regardless of their own config.
Following configurations work even when generateAllStructures is set to false:
/superflatbiomes generateVillages true/false Defaults to true, will generate villages in full and leave the rest as bounding boxes only.
/superflatbiomes generateStrongholds true/false Defaults to true, will generate strongholds in full and leave the rest as bounding boxes only.
This will generate flat world with grass, trees, ice spikes and other land features present in normal worlds.