I don’t use Play Controllers or have Zwift Ride. Guidance from Zwift is that on Zwift Ride you use the Z button to give out ride Ons and to return a ride on.
Check out the post linked below. Possibly read the thread from the top but summary in post linked appears to be that returning the ride on does work (most of the time) but other than haptic feedback you might not realise that you have returned the ride on.