There's a yardstick for this (similar to how some people use the "Bechdel test" to gauge female representation). Simply ask yourself, "Is this character black/Asian/gay/trans/etc because it is intrinsic to the character's arc, or does it feel like it was simply tacked on after the fact to seem progressive or for the sake of identity politics? Is this an interesting character because of/in spite of/regardless of their established identity, or does it feel like the creator simply wanted a [INSERT MINORITY HERE] character, and they come across as a shallow, one-note character whose identity revolves almost entirely around their minority status?"
That sounds like a dangerously offensive test, treating "white het male" as the blank slate.
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Official Teetotaller of PotD Dovie'andi se tovya sagain!