I have no doubt a military could build a weapon that could use some form of EMP pulse to completely destroy my cell phone if it were an equivalent distance from a ground-based attack site, in an environment where it wouldn't be simply destroyed. Heck, I wouldn't be surprised there's some researchers who could put something together from their test bench and bits lying around in the lab in a day or two. Doing it to a hardened target is going to be much harder.

It seems not totally out of the question. My calculation yielded an aperture requirement of 1cm for a blue-ish laser. Which yields a 50m beam at the height of a starlink satelite