The Fifth Season by N. K. Jemisin and The Poppy War by R. F. Kuang are notably influenced by the Harry Potter Wizarding World. Both include wizarding schools that do a better job of explaining where and how students are organized and regionalized.

Also, there’s the age-old standby Earthsea.

But yeah, this is the same problem as with Quidditich. When the story is about One Special Boy around which the rest of the world revolves, the resolution of non-Harry adjacent people and places gets blurrier and blurrier the farther you get from him. One reason the setting could have used a sequel (or prequel) series that has characters doing some world traveling, rather than cloistering themselves around the implied history of the original.

Fuck TERF weirdos and losers