I am also experiencing the same problem. Garmin connect is not showing swimming pace for all swimming activities, including past activitie. This started since the last Android update.
Same problem for me. Is it a UI change or it's a bug? The data is there but not visible. The web app shows the pace but the mobile app don't. As well the pace is available in Strava. It's frustrating to check in other app, as long as Connect is the primary receiver from the watch.
