Sonos one using Alexa app

I’m unable to link my new sonos one to the Alexa app. I’ve set up as per instructions on the sonos app and have downloaded Alexa app and have tried to link via the skills tab but am told to go to device set up but only given options off echo, echo plus, echo dot and tap so no option to and sonos and when attempting to add device via smart home tab it repeatedly comes up with discovery failed. Have asked Alexa to discover devices and it cannot find it. Any suggestions