What if EU forced american companies to sell off their stuff to european companies? It isnt that easy.
That would likely be unwise, but it would be a legitimate use of authority.
Why doesnt google or meta operate in China?
That said, so long as you don't have data centers in the country, what can they realistically do to stop you if you have a VPN?
There's nothing illegal w.r.t a private citizen trying to circumvent censorship afaik. If you're trying to use illegal content or services (hitmen, drugs, child porn, non us compliant crypto such as finance etc), then I can see the retribution, but unless you go full middle east/CCP people will still get access to and repost it