Disney / Pixar has to walk a very fine line with this.
On one hand, if you never have a POC as a lead, such as in Soul, Princess and the Frog, this, etc.... you appear racist and pandering only to white audiences.
On the other hand, if you keep the POC the entire film as their true selves, you would lose a lot of white audience $$$, causing the film to tank. If Princess and the Frog kept Tiana as Tiana for the entire film and not a frog, same with Soul, many white audiences would skip the film, children wouldn't buy toys, and profits would be lost. Same would happen if you had an Incredibles movie with Frozone as the main lead. It would not work with Disney's audiences. And I HATE it has to be this way. (Coco and Encanto are exceptions, but Disney white fan bases are more welcoming to Latino and Hispanic cultures than African American, and it is sad.)
I was one of the people pulling for a Rey - Finn relationship to happen in the Disney Star Wars trilogy. It was originally planned from the beginning, it was set-up perfectly in the first movie, it was planned to conclude in the final film as a love story.... but audience reaction had to be considered, and sadly, Finn was dropped to a side character and Disney bended knee to the vastly white audiences demanding a "Reylo" hookup, as it made them feel more comfortable.
Again, I'm just the messenger on how it works in the business. I hate it. Disney Pixar does too. But if you make your audiences uncomfortable, damaging losses occur.