Unable to add Sonos Playbase + One surrounds to Home app

Title says it all, can’t add my living room system to the home app. Have a pair of surround ones and a single one in other rooms and added without issue, but the LR group won’t even appear as an available HomeKit device. Not typically connected through Ethernet, but tried that as well and no luck. The speakers show up as available and work through airplay, but can’t get them to appear as available accessories in the home app. Eero pro with two beacons. Any tips?