Alexa Routine with Modes

I'd like to set-up an Alexa routine that recognises my phone location isn't at home, at which point it changes my Ring Mode to 'Away', and the opposite, when my phone is home it sets the Ring mode to 'Home'. I can create the routine in my mobile Alexa app, but all my Ring devices are "unsupported" and I therefore can't add them to the action. Any ideas?