Why does Game Center show a few player ids when I never used it or invited anyone to participate

Hi day120,

Thanks for posting in Apple Support Communities! If you need to set restrictions for Game Center, follow the steps here:

1. "Go to Settings  > Screen Time > Content & Privacy Restrictions, then turn on Content & Privacy Restrictions.
2. Tap Content Restrictions, scroll down to Game Center, then set restrictions."

-Play with friends in Game Center on iPhone

If you still have concerns, contact Apple Support for further assistance.

Cheers!