Panasonic Generic Blu-ray is on the BR1 mapping for Theatre. No other specific Pana entries. Guess you need to find if Pana have changed codes for the 4K equipment?

I have a Panasonic DP-UB820EB and when I was using my Eclipse with PUC I had it set to the Panasonic Generic Blu-ray.  Now using the Theatre my Apple TV 4K (2022) & Sky Q use the PUCs.  My 820 goes into my LG G2 directly in hdmi 1 not the Theatre; and I need to use the LG remote for the hdmi-cec, or the 820s own remote, as the BR1 does not to my knowledge do cec. FYI I use my Nintendo Switch as the other hdmi into the Theatre.  My feeling is the PUCs are best saved for the devices I use most often. Of note for the Apple TV 4K (2022) the only PUC that works in the long list is an old “Apple TV 4”.  Strange because there is a new Apple TV 4 + 4K but this does nothing.

Reading beojeffs account of his new BSTH, it seems he is controlling Apple TV and a Sony UHD with the HDMI-CEC protocol without the PUC.  This would mean anything with CEC is controlled anyway and PUC is only required on older non-PUC devices? The BR1 does not do anything apart from transmitting and receiving comms from the BSTH or other BT controlled B&O products. Listings and settings from the BSTH are loaded from the app, transmitted via the BSTH to the BR1. Therefore, I think there is a good chance you can free a couple of devices from PUC control??

I still feel like i am missing a answer regarding the Stage & Panasonic? Haha