All I'm getting from these is TikTok has a better recommendation engine? Am I missing something?

Has anyone scrapped all three to show for a newly created account there is significant difference in topics or something like that?

The academic research is scarce.

This is the next one I found (from a high schooler though)

https://www.jsr.org/hs/index.php/path/article/view/2428

It doesn’t look like a well researched area in terms of academia. I am not an expert in this so don’t know why