Soundbar connectivity Cosmos Max

Hi. I have my Cosmos Max set up on the rear wall of my living room with the screen in front on the front wall (obviously). I’d like to add a soundbar but I don’t want a cable running across the floor (if there was one long enough at that!). So can you recommend a wi-fi or bluetooth soundbar that is compatible with the cosomlos max, or does a wifi connection not allow for dolby surround sound? I presume bluetooth would not be suitable for surround sound. What wireless set ups have you used and do you get dolby / surround sound using wireless as I can’t find an answer. Thanks!