Click Unblock next to the player’s gamertag.
If you aren't near your console, you can easily handle this from the mobile app or your PC. Open the and sign in. Tap your profile picture (usually in the top corner). Go to Settings > Account . Select Privacy & online safety . how to unblock people on xbox
Select Settings from the dropdown menu.
Tap Blocked users . You’ll see a list of everyone you have blocked. Click Unblock next to the player’s gamertag
How to Unblock Someone on Xbox: A Simple Guide for Console and App how to unblock people on xbox