I have searched and read all the previous threads on SONOS integration, and have tried some of the troubleshooting, although some of those threads are a couple years old, so creating a new one in hopes someone has found a solid solution.
HUB: Hub v2 US
SONOS Speakers: 6 (I read previously that 7+ speakers became an issue).
Just a little background: I previously had the classic app and had all my SONOS speakers functioning and integrating fine with this hub. Fast forward to now, I have had my hub and speakers not in use for the past two years, so was unable to do a migration from the classic app to the new one, and did a factory reset on my hub. My SONOS speakers are recognized by other 3rd party apps (Lutron), although under a device scan and a device add in-app, they are not discovered. I have also tried adding a speaker via ip address.
Are the sonos speakers on the same subnet as the hub? Using the Sonos integration and not an old groovy smartapp? I ask because you mentioned trying to add by IP address which I do not believe is an option in the current sonos integration.
Speakers and hub are both connected to the same router, not sure how I can check subnet of either. Yeah they were previously added into the classic app using SONOS integration. I only tried the IP route after the new app failed to recognize the speakers, as that was a suggestion in an old thread on the forum here.