Play with friends in Game Center on iPad
In Game Center on iPad, send friend requests, manage your user profile, earn achievements, compete on leaderboards, and play with friends during a FaceTime call.
Apple Support
Go to Settings > Game Center.

Tap Invite Friends, then enter their phone number, email, or Apple ID; or tap to invite someone in your contacts list.

Recipients can respond to friend requests in any of the following ways:

In Messages, tap the link.

In a supported game, tap the Game Center profile picture, tap Friends, then tap Friend Requests.

In the App Store, tap or your picture at the top right, tap Game Center, then tap Friend Requests.

In your list of friends, tap a friend to see games they recently played and their achievements.

You can also add a friend in the Contacts app (available if you and your friend are using iOS 16.1, iPadOS 16.1, or later). Open their contact card, then tap Add Friend in Game Center. After your friend accepts the request, you can view their Game Center profile from their contact card.

You can find and download a Game Center multiplayer game in the App Store and play with friends while on a FaceTime call.

During the call, open a supported multiplayer game, tap Start SharePlay, then follow the onscreen instructions.

See Use SharePlay to watch, listen, and play together in FaceTime on iPad.