fantasy anime recommendations that’s not an isekai

Well, historical fantasy needs it because that is where the fantasy element derives from, since it doesn't come from the setting (as opposed to high fantasy), which in historical fantasy is just our own Earth/within our own universe.

Now, as for all the other cases where someone could technically argue that every fictional series and film is fantasy because they all have some fictional detail of their world (even characters themselves) which don't exist in our own, sure, but that can be said for a lot of different things. It's a question of where one draws the line, which with genres and subgenres and all that in film and literature and everything else has always been fluid, subjective, and somewhat messy.

Individual towns and sometimes cities are often fictional while still existing within a larger real state/province/region of a real country or just a real country with the region not named. And so forth.

But I don't consider a series a fantasy by having a fictional character (basically they all do) or a fictional restaurant or grocery store or school or even a fictional town or city. But it changes when it comes to large scale-phenomena like entire countries, continents, planets (if implied to be a substitute for Earth and our Earth not existing, as opposed to just taking place on Mars or Neptune or some distant other planet in our own galaxy or elsewhere in the universe), etc.

Where everyone draws the line is going to be different. That's why you get the multiple rival definitions and understandings and it's never been an exact science or settled subject. "Why is this thing grouped with this set of things versus that?" Far beyond art, you see that even in taxonomy and so much else. There is arbitrariness, tradition, preference, etc. behind a lot.