There was a highly publicised case at Facebook some years ago with the same behaviour.
If you think that only TikTok does that, think again.
https://www.nbcnews.com/tech/social-media/facebook-investiga...
I do remember this case when it happened. It was pretty major news. It is not isolated either. Here is an example of google doing it.
https://www.businessinsider.com/google-engineer-stalked-teen...
Oh and here is another good one where the Executives were involved:
https://www.cbsnews.com/news/investigation-ebay-employees-st...
Seems like the other poster is right... this is par for the course