When someone stops sharing their location with you, you won’t be notified about the fact. However, there is a way to discover who’s disabled you from tracking their whereabouts. One of the methods is checking the “People” list: 1. Open the “Find My” app. 2. Go to the “People” tab. 3. You’ll see a list of people who can see your location and who enabled you to see theirs. If the person in question isn’t on the list, it means they’ve stopped sharing their location with you. Once the person reactivates location sharing, you’ll be notified if you’re still on their list.