I don’t endorse using these apps, but for what it’s worth, Instagram actually does have this feature (tap “instagram” at the top and select “following”). You get a chronological feed with no adds and no reels. Of course they don’t provide an option to make that the default as far as I know.
Yup so all they need to do is only allow that content feed for anyone under X years in some specific countries. Seems like they'll survive this, and it won't even be very expensive to fix.