There is a difference between a museum, which curates culturally significant art from places around the world and at home, to TikTok, a social media app that is for making money.
Just to clarify, TikTok does not do ad revenue sharing. They have a creator fund, but TikTok creators really make money via brand deals, merch sales and direct donations from fans.
You should look up some TikTok creators from Egypt, there is plenty of great stuff out there.
The basic premise of your argument as I understand it is that art is something you see in museums or art is something that has been gated by age or by scholars or by "cultural significance". This is not how art works, some great works were discovered long after the artist had died. TikTok creators create art, some of it good, some of it bad, but it's art all the same.
Second, that is not the argument I am making. The ancient Egyptian clay pot at a museum was just an example. I stated the act of getting money is not devoid of the context of which it was acquired when it comes to art.