> No, it would be enforcing the same requirements on chinese companies as the US enforces on their own

How are they going to do that?

> If they don't then fine them just as much, to have access to the US market.

That's not the issue, the Chinese tech companies would have more freedom and support for the international market. Access to the US is just one part of that and there are already obstacles to that market. The main point is that the US companies would be hamstringed in a way that China companies would not.