Not sure what confiscation would accomplish that regulation couldn’t? I mean we’re all aware that if regulators target TikTok then a new app would pop up and take its place.
But the thing about regulation is that it doesn’t need to be water tight. You can just target a small handful of large players and it will improve the situation in practice. It doesn’t matter if 998/1000 apps use addictive feeds if the largest two apps don’t and they have 90% of users/views.
It’s naive to think that regulation is going to cover the entire global internet.
If you regulated domestic companies out of existence, global options would pop up in their place. You could try to block them all in app stores but people would go to the web views.