The "manager" field does not show up on O365 user tab

[WebPortal]

In Office365 admin panel I cannot assign a user's manager.

The "manager" field simply does not show up on the user tab, and I have no idea why.

Is there a formula to let users define who their manager is in Power Apps?

Thank you.

[Alex_10]

@WebPortal 

you cannot assign a manager if you have no privilege (role permission).

In Power Apps user can use:
label.Text = Coalesce( Office365Users.ManagerV2(User().Email).displayName, "No Manager" )

[Pstork1]

Check to see if your Azure AD is synced with an on-premises AD.  If it is I think the manager can only be assigned in the On-premises AD and then synced to the cloud.