I mean sure, you can have a character with a Black identity that is not inherently america. Doomfist and Baptiste are not american but they are unequivocally, unashamedly Black. A Black Italian is well within the realm of possbility.
People's problem with Overwatch, which is warranted is that after 5 years, 52 characters and a plethora of possibilities:
They STILL haven't arrived at a Black Woman. Sojourn has been on the cusp for literally 3 years now and the tease of giving the fanbase what they want but constantly pushing things back, arguably for gains to be found in OWL, which is kind of being mismanaged right now. I don't fault anyone for being upset about Black representation in the game when that sort of thing is what we've had to deal with for so long.
Empirically false.
Mei actually has a bunch of good skins now.
What they really need to do is stop fucking around and port Mei, Zarya, Genji and Tracer's skins from HOTS into the game proper.