There's kind of two different categories of "genre." Things like sci-fi, horror, fantasy, etc., and things like action, strategy and RPG.
All of these have in common the fact that they have subgenres though. There are both turn-based strategy games and real-time strategy games, for example, but both of them revolve around strategy more so than action elements that may be present.
We all know that RPGs ultimately stem from tabletop RPGs, but within the context of video games, RPGs are not defined by "role-playing," they are defined by being focused on statistic or capability progression-centric mechanics for whatever the player is controlling. Due to the nature of this, "RPG" can blend in with other genres quite easily, and it's something that players typically enjoy, which makes adding RPG elements to other genres something that's very attractive and popular.
When it comes to blended genres, we have a sliding scale for communicating how those genres are defined, because there's a lot of room for specifics in here, and a lot of room for a variety of interpretations of how much a given genre element means within a game's design.
JRPGs are kind of defined by how much they abstract out interactions like combat into other systems, because this is the part of tabletop RPGs that were emulated by the genre progenitors. WRPGs center more around the player-choice aspect of determining how events - including the player character themselves - unfold instead (though they're also much more likely to have a wider-spread, but less-focused, set of abstracted systems to them as well). It's honestly just silly at this point to try and say that JRPGs can only come from Japan or that WRPGs can only come from an arbitrary "the west" just because of how well-established these are as styles of RPGs rather than points of origin.
Regarding Genshin Impact, it appears to be an Action-RPG. I haven't played it myself, but the action-game-style elements appears to be quite heavily-present in the overall gameplay, to the point where simply calling it "an RPG" (JRPG or otherwise) doesn't seem like it'd be appropriate for properly describing it.