What damage is caused by "laying down a bike"? [in reference to motorcycles]?

Would this be of any use perhaps.
Apart from that I don’t know to be honest.

Laying down a bike is having it over on its side well under way. For example going around a curve and run over some loose gravel and the bike slides out from under you. Then you and the bike slide together down the road. Going fast it can be very ugly. Lot of damage to you and the MC. I expect most of the damage would be obvious unless the front wheel slammed into a curb or some solid object, then you may damage the forks and that may be hard to determine just by looking at it.

it could be simple as losing your balance at a dead stop or forgetting to put the kick stand. Basically dropping it causing it to have some scratches, broken fairing or turn signal, etc.

I think it depends a lot on the reason you dropped the bike.
A simple stop and drop may just be light scratches.

When I laid down my motorcycle on a city street it trashed the Derby Cap, bent the side mirror, scraped the handlebar and scratched a few areas here and there. In all about $500.00 damage.

If I had freeway bars the damage would have been minimal but the freeway bars look so dorky.

When I laid mine down at about 10 mph I broke off the turn signal and brake pedal, and knocked a hole in the aluminum crankcase cover causing oil to leak out, making the bike unridable.
Oh and there were scratches on the side cover and gas tank.

I did not get hurt so I feel like I came out ahead even with a few hundred dollars of repairs.