No one but the primary user

Hi all, 

When a user that isn't the primary UPN signs on to a Windows 11 Pro laptop, explorer does not work.

When you try to load control panel, you get a prompt that it's been blocked by the administrator.

The machines are deployed through autopilot in a hybrid setup. 

Can you advise what settings maybe causing this as there's no config policies that adjust control panel or explorer deployed.