I've joined the 3 mile weekend challenge last feb 12-14 but unfortunately it was not syncronised by my Vivomove & did not get the badge
[https://connect.garmin.com/modern/dashboard/47422926]
That is a link to a dashboard. You need to click the activity and use that link. It should like something like this.
[https://connect.garmin.com/modern/activity/6370919518]