It was working fine before Big Sur, stayed broken with Big Sur, anyone tested with the latest update?
Philips Brilliance 346P1CRH detected as PHL 346P1C.
Connected from MBP 2019 to the display with a short official Apple thunderbolt cable.
Not that it is detected as an audio output device and everything else is working fine (100Hz etc.), but it is showing "The selected device has no output controls".