Yes, it seems we do have different ideas of the word medieval. To me, medieval is not an abstract idea, it’s a specific period in European history. To be medieval a setting has to bear significant resemblance to that period.

This is not medieval. It’s very ornate but it bears no resemblance whatsoever to medieval art or architecture. If anything, it’s closer to Victorian than medieval. Everything I’ve seen in HK screenshots tells me it’s a fantasy pastiche of elements. It has no affinity with any particular period in human culture. Rather, it’s a cut-and-paste construction. (I hate the word appropriation because it implies theft. I do not want to imply that).

Like if a fantasy game is set on Mars with a bunch of green skinned Martians as characters then it’s not medieval even if the characters use Anglo-Saxon instead of English. It’s a pastiche of science fiction, fantasy, and medieval elements and it suffers from the same issue that a lot of bad Star Trek episodes had (see: planet of hats), which is verisimilitude:

Why did this society, which otherwise seems completely alien, just happen to evolve a conspicuous element that’s uncannily similar to an element in human history?