In defence of the first they appear to be in make up. If they’re playing a First Nations character that’s fine

How is it fine? Would it be fine for a white actor in makeup to play a black character?

But I assume the Little Mermaid wasn’t a remake

It was a remake of the Disney animated film that a bunch of people lost their shit over because, as everyone knows, real half-fish daughters of the god of the sea are white.