I am a type 1 diabetic and recently switched to GrapheneOS with a Pixel 6 Pro. I use the Dexcom app to connect with my continuous glucose monitor. The Dexcom G6 app works flawlessly with sandboxed Google services. I recently upgraded to the new Dexcom G7 sensors but am getting a connection error trying to login to the app.
I read a reddit post about someone having the same error and they were able to get around the issue by turning off private DNS: https://www.reddit.com/r/dexcom/comments/14hzpwi/connection_error_dexcom_g7_login_new_phone/
I tried turning off private DNS, using google server Internet connectivity checks, and using google server attestation key provisioning. I still cannot get the error to go away to even log into app for the first time.
This really sucks because I don't want to have to carry around two phones just to be able to continue to monitor myself. Any help would be appreciated.