Sometimes an app appears "blocked" or non-functional because it requires an update or a license check. If an app isn't opening, it might be stuck on an old version.
Garmin watches are battery-efficient to a fault. They will automatically block/unload apps if: how to unblock app on garmin watch
*Note: On older models (Fenix 5/6, Forerunner 245), you might need to hold the button > select Settings > Glances > Add. * Sometimes an app appears "blocked" or non-functional because