Party mode on Yamaha receiver

I can’t find the command to set-up the party mode on my old Yamaha HTR-8063 (equivalent to RX A 1000)

it does work from the web interface and the Yamaha app, but no codes are found in roomie. I have tried all combinations of options when adding the receiver (YNC, YCX, etc).

My workaround is to launch the web interface into roomie and press the Party mode button, but it is cumbersome. I would prefer an automated way.

Any suggestions?