Start here:

https://en.wikipedia.org/wiki/Starlink_in_the_Russian-Ukrain...

Scroll down to Russian use.

Starlink receivers have been found in use in drones by both sides in the war.

There's a lot of Open Source intel on this.

I guess it is to a degree unavoidable - ukrainian units are using a lot of crowdfunded starlink terminals on the front, so even if you geo fenced usage only to the virtual cells outside of Russia controlled territory, you would also disable ukrainian sets at the front. So if Russians smuggle sets from other countries, they might not be really easy to tell from the "good" sets crowdsourced by the ukrainians and used at the front.

As for use in long range strike UAVs I'm sure ukrainian units have specially registered units that will work anywhere but again, Russian long range kamikaze drones you have a smuggled unit that only activates once on ukrainian territory and be used for terminal guidance or reconnaissance. By the time the system spots a new terminal moving quickly in the wrong place the thing would have rammed into a civilian building somewhere.