Can we now do the same with Instagram and Facebook and the likes? Basically all of social media?

No. In fact, we're going to gear up our marketing campaigns for IG and YT so that we can reroute all that profitable children's traffic to a Good American Liberty Loving Social Media Company.

Can we also please start banning kids from the Internet now? Since 20 years ago I’ve been saying that kids under 14-16 should not be on the Internet

I can't imagine how this would be enforced, much less whether arbitrarily cutting kids off from what will (let's face it) be an essential part of their lives as adults is actually good for them.

To pull from an old XKCD, simply giving people a novel form of communication isn't what's bad for them.

This shit is what's bad for them

And you need to moderate content in order to avoid this sort of shit. Simply banning it all makes about as much sense as banning your kids from looking at magazines, because Playbook and Heavy Metal exist.

I hate desantis, but that Florida kids and social media ban is great

If you consider how Florida actually enforces its laws, I think what you'll find its actually really awful. You're going to have a bunch of lower-middle class parents and teachers getting random filings against them for things they have very little control over.