My company operates corporate aircraft (which may or may not have cc on board) and regional aircraft (1 to 3 cc).
All our pilots must learn evac commands as well as cabin preps. If something happens to the lone cc on board, the pilots have to take over, obviously flying comes first, but if the cc is incapacitated onlanding/impact the pilots can then come out and take over the cabin evacuation. The first few years they weren't so keen on the commands, but some of them could give cabin crew a run for their money now. We trains front & back end crew together as much as possible..we find it simply fosters better communication and coordination.
Cheers
