Nations have always been sensitive about things flying over their airspace, e.g., various aircraft shot down during the Cold War.
But satellites have always flown too high to be reached by existing antiaircraft weapons. Lasers are the inevitable next step.
Whether existing overflight treaties extend to spacecraft or whether the most technologically advanced nations just use space as they please,
since many satellites are used for commercial as well as or instead of military uses, space overflight is a generally accepted okay thing.
You can spy on me if I can spy on you, we can each verify we're not doing provocative things, all that good stuff.
Space weaponry presumably is still a no-no, and any messing with another nation's peaceful (including non-weapon military) satellites also can be assumed to be unacceptable.
Laser tracking is one thing, but anything used to interfere with or degrade any satellite is hostile.
Stay tuned (as long as satellites are allowed to still function enough to do that).
Meanwhile, assume that in any conflict, any entitites with the ability to attack or use their adversaries' satellites will do just that.
