Neither Russia nor China's known weapons deployment is likely to breach the very narrow restrictions of the Outer Space Treaty, and the latest capability the US has vaguely claimed probably doesn't either.

In practice, the US has had practical counter space and electronic warfare capabilities in space for decades (even a regular satellite with enough delta V is a viable weapon, but superpowers have more targeted capabilities than that), and the observable difference is that the current administration's approach leans more towards bragging.