I thought the Russians relied more on military gas powered drones (like the https://en.wikipedia.org/wiki/Orlan-10 ) and were not using cheaper fpvs. Certainly in the earlier days there was a lot of footage of Ukranians dropping grenades and mortars via improvised drones and I think the Russians were more spotting with Orlans and then using artillery.

Most if not all the random videos I've seen of cheaper FPV drones were Ukraninian but that could totally be my social media bubble.