I'm not going to argue whether or not Elma is black; I haven't played the game and only did a quick scan just now of a wiki. Sure, she "counts." This is what I mean with how white people look at racism — there is this instinct to try to prove that it's already solved to the best it can be solved, and talking about it any more is just impolite.
I will say that if this character, whose design appears barely a shade different from any "white" anime protagonist, is genuinely presented as any kind of proof that Nintendo is somehow doing acceptably okay in this regard, then you should ask if you think that your own race/background might potentially be coloring your view on the relative importance of this.