All of the hard wired speaker zones were wired to a junction box in my bedroom closet when they built the house so there is probably 35ft of distance between the sound bar and the connect amp.
Best answer by ratty
This might help: https://support.sonos.com/s/article/2237
Note however that to use the Connect:Amp for surrounds the system has to be in SonosNet ('wired') mode and there must be a wired path between the C:A and the Playbar. It can't use a wireless connection.
In other words either both must be wired to the network; or some other component must be wired, plus a direct Ethernet connection between the C:A and the Playbar.