Terralith ~ Overworld Evolved Fabric Mod 1.18.2/1.17.1 is a datapack that the author packaged as a Fabric edition. Its main aim is to basically overhaul the Overworld by using new biomes and caves.

About Terralith ~ Overworld Evolved and Main Features
The mod completes its job without adding any new blocks. It can make every change compatible with vanilla clients.
The owner spent about a year and more than 500 hours research and achieve the present result.
Currently, Terralith supplements over 65 new biomes. Additionally, it has updated most vanilla biomes with modern and better features.
Lush Caves and Dripstone Caves have spawned with plenty of caves of the creator.
The underground is a location that has numerous variants.
There’re many strange sorts of cave shapes, newer cave biomes, and caves that he made of the alternative stone types.
The mod utilizes the experimental extended world height. Hence, you have to generate another world in case you’d like to mine the content.
Other information
The maker has crafted a world for explorers, builders, miners, and everybody.
If you expect to build something in realistic biomes, you should explore Yellowstone or Monument Valley.
Moreover, you can visit Moonlight Grove and Mirage Isles. Or, you’re able to travel to the mysterious Alpha Islands.
Remember that the current product is incompatible with almost all biome mods that modify the Overworld! Most structure mods will run nicely.
Terralith ~ Overworld Evolved is a mod for World Gen, and more. It requires Fabric API and Fabric Modloader.
Requires:
Screenshots