Ring Widget not showing devices

Hi,  I’ve just upgraded my phone to iPhone 16 pro and have tried to add a camera as a widget. I have a ring standard account. The ring widget is showing on my phone but won’t add a device. When I try to edit the widget to add the camera the message says “ to set up an unlock widget add a supported device to the ring app” I have googled this with no joy.  Does this only work with specific devices or do I need a premium account?  Many thanks.