A few months ago, I've seen a biome mod somewhere on the internet. it added lots of new biomes, and one of them was some sort of a caldeira/crater with a sakura forest or something in it. it looked a little like the crater in the anime your name (but with a cherry blossom forest), and i think the creator also stated that it was inspired by the anime. I think the mod was for Fabric, but i'm not sure.
I've been searching everywhere and for the life of me cannot find this mod or even a screenshot of it again. I'd like to find it again, in part to prove that I am not crazy, and in part because i want to create a world with it.
The only biome mods for Fabric to my knowledge are Terrerstria, Traverse (a small one that's more vanilla focused besides the autumn biome) and Oh The Biomes You'll Go which if not Terristria I'd assume it's Oh The Biomes You'll Go. That or some smaller biome mod I haven't checked out yet or forget the name of. Been a while since I've looked at mods as deeply as I used to.
Other than that there is Astromine which has meteors, the only Fabric mod I know of though that has them.
Otherwise what TileEntity said covers the main biome mods for Forge and unaware of a meteorite besides Applied Energistics 2, these are the only mods I can think of that have meteorites on modern versions (or again a smaller mod I'm forgetting that I looked at months ago and not confusing it with 1.12.2 instead of 1.16.5 or 1.17.1). That's my 2 cents at least based on what your describing and what I remember.