A mod like Modern Beta should do the trick as it has Alpha/Beta/Infdev and Indev terrain. For textures I forget if it has the blocks of them or not but the generation it does for sure.
It is 1.18 though surprisingly though. I can't think of any others though biome or terrain mods for Fabric that do alpha than this while Forge likely has others I assume. It will likely make it's way over at some point I assume. They are probably fixing a few things before porting it over by the looks of the changelogs. No idea how much a 1.19 port undertaking is either, could be dramatic could be straightforward who knows. I'd say wait or go back to 1.18