From Sugarmate Facebook Group (posted Thurs Dec 9/21):
The Sugarmate™ app can once again connect with Dexcom CGM data for U.S. customers.
We’re sorry for this disruption and thank you for your patience. Please follow the link below for easy-to-follow steps for updating your app and reconnecting your data source.
For our friends outside of the U.S., please know that we’re continuing to work with Dexcom to understand when we can launch with the Dexcom Partner Web API Program outside the U.S.