Did you see any visible damage on the boards inside the devices? I would assume they were all switched off (meaning the DC supply breaker was off).

This is the main thing I am trying to assess. (if a lightning strike leaves visible signs in any instrument that is damaged.)

I am just looking to gain knowledge about the way you can or cannot distinguish between a lightning damage and a major short for the AC supply if that had gone bad and pushed the AC into the DC supply.

And thank you, indeed the insurance was contacted and they have already send someone to review the damages.