Because Sonos insists on closing questions to comments I will ask the question yet again despite the disturbing number of people who have or have had the same problem.
The problem is that Sonos Roam is an atrocious piece of kit. When it decides to occasionally connect to our wifi network it is impossible to connect it to Bluetooth. I have read every question/comment/so-called solution in this forum to no avail. We have a fibre street connection, a wifi network that has operated for 15 years without fault. I can run/stream/connect every other device known to mankind to the network once and leave it to breathe.
We have to reset the Sonos “network” every other week. I have to power down all the speakers. We have to reinstall Sonos on all our devices (all iPhone/iPad/Mac) and hope and pray that it will work. The Roam had never connected to Bluetooth.
I can connect to any other Bluetooth device available. I can buy a $10 Bluetooth speaker from the warehouse down the road and connect to it immediately using common sense. I can drop it in the pool and it still goes. One day a Sonos device will go.