!Manual requests must be made within 1 month of purchase, anything not requested by then will be forfeited. !
Transform your claimed land to whichever biome you want.
Be sure to only request a biome that exists in vanilla or Cobblemon 1.21.1. By default the biome will be from y=-64 to y=320 (no matter which y coordinates you select), but you can specify if you want it to be a 3D biome with specific heights (only really needed for floating islands or caves).
Alternatively (or within the changed biome), you can make a request to turn grass in an area to a different block to instantly give it a much different appearance.
Note: Request in the Donor Request channel in Discord.
(Cannot be changed or moved later, choose carefully!)