Alexa Routines (which are distinct from SmartThings routines) are a very new feature and it's not surprising to me that they are not yet available on the Sonos One. You also cannot, as yet, add a Sonos One as an 'Alexa-Enabled Device' to an Alexa group either, but that feature was only added to the app a few days ago. Based on the comments sprinkled throughout the forum, I believe we can expect most of these features to become available over time, but being an early adopter sometimes requires as extra dose of patience.