I have about 10 Sonos speakers (over the space of 10 years), and now (about 6-10 months ago), I can not connect to any of them. I can see them on-line
sudo arp-scan -I eth0 192.168.1.1/24
I can ping them, etc., but my android app can not connect to any of them. I should also mention that over the space of 10 years, Sonos has worked very poorly. Don’t touch it; it’s expensive, very poorly supported, and mostly doesn’t work.