Miles' acceptance is different: He already endured a backlash in the comic book culture as "a black man replacing Spider-Man."
When it turned out that White Peter Parker was still *a* Spider-Man and not being killed off or disappeared, the brouhaha died down and comic book readers started liking Miles and all the other Spider-Variants.
This all happened way before his movie came out.
So the argument "but people are OK with Miles" doesn't hold water, because, at first, they most definitely didn't due to skin color.
en.wikipedia.org
Maybe we need a Disney Princess Multiverse.