I have the xbox (panasonic) tuner.
on the configuration page is a wizard follow that.
I suspect you have made the same mistake as I have in the past.
Configuration, DVB inputs. TV adapters, highlight the panasonic, on the right will be the parameters box, enable, over the air epg tick, networks, from the dropdown select your network, if there is nothing there, that is the problem. save & force scan
Under configuration, dvb inputs, networks, highlight the network, edit, select the predefined mux you want