Well, first nations people have varying opinions about frybread, actually. It's a Colonized product, meaning it didn't exist until colonizing Europeans showed up and flour was being used in trade. First nations people throughout north america generally used corn, or other flours to make other flatbreads (such as tortillas), however, so there's varying views, as I said. Some first nations people decide to own it as a product, and some see it as an example of colonization and the broader problem of low food choice on reservations.

If you're interested in more info about the First nations food situation, this is a decent vid:

As for the Kimonos, I think it's easiest to think about it in levels.

Wearing a heavily japanses influenced dress? 100% a-ok.

Wearing a Kimono made for you by a Japanese maker that you paid a fair wage for? Go for it, though you might ask yourself why you want a kimono specifically so bad and why another dress would not do.

Wearing an antique kimono with someone's history all over it (symbols, colours, etc)? pretty sketch, especially because you're wearing a delicate antique.

Wearing a costume kimono? No Bueno. someone else's historical daily culture, and to an extent their current culture isn't a costume.

Wearing a costume kimono and full "geisha" makeup? #realbad

Being a eurpoean person playing the role of an asian person in a movie? Full retard.

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As much as I got a bit cheeky near the end, does that make sense? Like, having respect for a culture, and loving the designs of a culture, and being influenced by them are all great. Fetishizing a culture, or using that cultures symbols as a costume are not okay.

Are there people who go overboard with this? Sure, but there are also people who ask Mongolian people if they know how to make sushi because they "all look the same". The attitudes are equally bad, but at least the first one usually comes from being sick and tired of dealing with idiots, and not from being an idiot themselves.