This is a simple data pack I'm making that currently adds 1 new dimension with 4 new biomes. The biome can currently only be reached by using the command /execute in wrksworldgen:wasteland run tp ~ ~ ~ but I might add an item to get there eventually.
Here's a list of the biomes:

• Wasteland - A cobblestone and stone biome where everything is gray
• Desert Wastes - A biome made of soul soil and soul sand.
• Grassy Wastes - Basically the wasteland but grass spawns naturally.
• Cold Wastes - A biome with grass and higher terrain.