A:AnswerTechnically yes but it’s no the preferred setup. I did this in a pinch when my old PLAY:BAR had issues. I connected the PLAY:5 to the TV using a 3.5mm cable and pair it to my SUB. I then grouped it with a pair of PLAY:1 in the rear. This will only play in stereo, not surround sound.
A:AnswerIf i understan your question correctly, the sound bar does connect via HDMI/Audio/ARC port. But the rest of the spealers go through your WiFi and the phone App. The Sonos App is key to set up and you add each speaker via the app and home WiFi