>>lazyfa+tC1
I believe the US and China (and Russia according to the Wendover video [1]) already have anti-satellite weapons to be used in a conflict, but they aren't like "blow this up" because of space debris. I'm not exactly sure how they work, but they aren't what we expect with terrestrial weapons.
1: https://www.youtube.com/watch?v=V0DmliiUFHk