My Son can’t play online multiplayer games with shared gamepass ultimate subscription

Hi, we have an Xbox series X and I have a game pass ultimate subscription. My son is a member of my family with all the privacy settings set to allow him to play online. The Xbox is set as a Home Xbox and he can access game pass games and download them. When he tries to play online in games like Minecraft, it says his account settings are preventing him from doing so this is also the same with FIFA. Any epic games titles (Fortnite, rocket league) Work with no issues, allowing him to play online multiplayer.

Does anyone have any ideas what this might not be working?

:)