If you can't share your Activity rings
Here's what to do if you can't share your Activity rings or see updates about your friend's activity.
Learn more about how to share your activity from Apple Watch.
If you don't see the Sharing tab
If you paired more than one Apple Watch to your iPhone, the Sharing tab won't appear in Activity until you update all your watches to the latest version of watchOS.
If you see an error when you try to add a friend or send an invitation
Sign out of your Apple Account on your iPhone, then sign back in
Tap Settings > [your name].
Scroll down and tap Sign Out.
Enter your Apple Account password, then tap Turn Off. If you forgot your Apple Account password, you can reset it.
Go back to Settings > Sign in to your [device], then enter your Apple Account password.
Tap Sign In.
Try to add your friend or look for the invitation.
If you still can’t add a friend, make sure that they have an Apple Watch and that you haven’t added the maximum number of friends. You can add up to 40 friends
If you don't get updates about your friend's activity
As long as your iPhone can connect to the Internet and you're signed in to your Apple Account, you can get updates about your friend's activity each day. If your iPhone can't connect for multiple days, or if you sign out of your Apple Account, you might see missing days.