I’m sure plenty of black, hispanic, asian, Romulan, Klingon and Vulcan suburban moms would want to dress their eight year old princesses like a Disney princess that looks like them.
Mattel figured this out a long time ago with Barbies.
Disney has non-white Disney princesses. I’ll yield to anyone here who follows Disney princesses for a count.
The problem is that the race swapping of a long-established, well-loved character violates the source material. And the race swapping always runs one way only.
There would be no issue if Hollywood built out original characters that made sense, developing stories that provide representation to newer tribes of Americans.
But that would require hard work and creativity. It’s easier to just race swap the white characters. It’s really no different than putting blackface on a white actor — which would likely be career ending.