[ACCount37]

A Starlink V2 Mini sat (what they're currently launching with Falcon 9) has a total solar panel area of about 10.5 * 2.5 *2 = 105 m^2.

Solar irradiance in LEO is about 1350 W/m^2 when unobstructed. A space-grade solar panel reflects 5%-10% of that back as light, with the rest absorbed as either heat or electricity.

This should give you an idea of what kind of thermal flux the satellite is designed to be dealing with.

[tatjam]

Also you have to consider that even top-notch lasers have a divergence (out of memory, I may be wrong by an order of magnitude) of 10mrad or so, and you are physically limited to not much better than that, so you need pretty insane powers to damage, let alone destroy, a satellite at LEO altitude.