here's the full list below, but it seems that fairly recently purchased devices are no longer being supported by Spotify Connect:
https://support.spotify.com/nl/article/why-cant-i-use-the-spotify-app-on-my-speaker/
I don't especially care whether this is Spotify's fault or the lack of advocacy on the part of the manufacturers to request continued support by Spotify, but either way, IT'S A JOLLY BAD SHOW. Consumers are being treated with contempt.
https://support.spotify.com/nl/article/why-cant-i-use-the-spotify-app-on-my-speaker/
I don't especially care whether this is Spotify's fault or the lack of advocacy on the part of the manufacturers to request continued support by Spotify, but either way, IT'S A JOLLY BAD SHOW. Consumers are being treated with contempt.