Just purchased a Logitech Pop and Bridge. Support of Sonos is claimed, and the Pop sees other devices like the Hue Lights.
My configuration is as follows. I have a NetGear Orbi ( V126.96.36.199 firmware) upstairs, into which is plugged an ethernet cable from a Sonos One (gen 1).
Downstairs, I have an Orbi Satellite and a number of Sonos Ones (gen 1) as well as a Beam (all of which are on the Sonos network created by plugging the ethernet cable into the Orbi - they all show as wire connected on the network). In the image below the Pop Bridge is 192.168.1.56 (2.4GHz) and the Sonos is 192.168.1.23 (wired - actually wireless using Sonos network, but appearing wired to the router).
The Sons App as well as Apple devices see the Sonos with no issues. I'm able to control them through Apple HomePod Siri, or from multiple iOS devices (like an iPhone - when on the network - via Airplay2.
Spent a useless hour with the Logitech Support team yesterday trying to get the POP to see the Sonos.
Similar, maybe, tried the Sonos Sequencer App (iOS), and it failed to auto discover the Sonos as well, but was smart enough to ask for an IP address after which it found all the Sonos.
Looking for ideas that do not involve chaining my network configuration (e.g. the Sonos on it's on mesh network - because otherwise the music fails out of sync when used with Airplay 2 after a while - I assume from congestion). I suspect there is some discovery protocol not propagating across the network? Perhaps a setting in the router (wouldn't that be lucky).