Connect IQ working on Android 8.1 with a Fenix 7X, had the watch for 18months and previously been able to make connect IQ work.
I just made sure everything's "plugged together" by successfully selecting, downloading and activating a data field from the front IQ menu. It clearly knows what watch I have and allows downloads etc, if the accounts weren't properly linked this wouldn't happen.
But if I search for a specific data field it ALWAYS returns nothing.
To me this looks like a fundamental bug with ConnectIQ.