On the main bottom toolbar in the Sonos App the ‘My Sonos’ tab is the ‘star’ icon on the far left. The main page is scrollable, so you need to goto stations and then to ‘see all’ select the right facing arrow next to the actual title ‘Stations >’ to expand the list for that section.

Thanks Ken, much appreciated. The magic words were Scroll Down and all I need now is to find a way to delete a saved station.

I think I just found Edit,