I'm not seeing the connection between the Google/Apple duopoly and the rise of TikTok or other addictive social media. I spend half or more of my waking hours on one Apple device or another, and if I had only things Apple has pushed at me to go by, I'd not even know TikTok exists. What's the sequence of events you expect from removing Google and Apple's platform power, that'll lead to reduced social media activity on their platforms and/or in general? Apple, for their part, seem to have spent a fair amount of effort developing features that exist only to curb addiction-like smartphone use—I'm not sure why they'd have done that if they were that focused on getting you to use your phone as much as possible.

Now, if we were talking about whale-chasing F2P games, I'd see your point, but I don't see the connection with social media.