Since yesterday my watch doesn’t sync steps, HR and other features on My Day. Logged in with the same account both in app and website. Haven’t done any other changes. Reinstalled the app but it still doesn’t sync. iPhoneX iOS 12.1.3
Are you sure you are not running an iOS beta operating system? The latest iOS beta that became available a couple of days ago has caused issues with Garmin Connect Mobile bluetooth synching. There are a couple of threads on this forum that have recorded this issue.