I don't know; We did unusual attitude recovery in Warriors, (single engine piston), for our ATPL, which was very useful, and judging by the amount of recent incidents and accidents where pilots have manifestly failed to scan their instruments and actually FLY their aircraft; I think it would be very beneficial to do UARs in Airliner SIMs too.
With so much automation in our aircraft, a lot of SIM time needs to be spent practising ECAM/EICAS drills etc, and basic piloting is increasingly taken as read and not practised. But basic handling :- speed + attitude = performance, and a good instrument scan is still absolutely fundamental to our craft.