Minecraft super flat but with all in game biomes, and most structures. This also has other in game ways to get normally unobtainable items in super flat, which you can obtain from fishing or cat gifts.
https://www.youtube.com/@ryanthescion
Currently this mod is for a Datapack, but in the future we plan to convert to a fabric mod in order to allow for some other features to diversify how you get certain items, as well as find structures. Until then though, enjoy - when the fabric version is ready we will try our best to make it easy to switch from the Datapack version without nasty chunk errors, but for now enjoy superflat+ :)
The fabric version of super flat+ will (hopefully) be out soon - along with a full list of everything it changes (I know alot of you have been asking on Ryan's discord). Keep in mind however I will not be back porting the fabric mod to versions below 1.20.1

Superflat but with all biomes (and most structures)