Saved activity appearing in my Garmin forerunner 55 watch history but not appearing in the Garmin mobile app

Hello Garmian family,

I am sincerely asking for your help. I am using a Garmin Forerunner 55 watch. Yesterday I did a 10km race and saved the activity that appears in the watch history, but it is failing to sync to the mobile Garmin app, How can that be resolved?

Thanks in advance.