As a manager, you should not be able to modify a series of settings. In the UI this is indeed hidden as a convenience for the role since most managers would not be savvy enough to modify these settings. They can use their token to still modify those settings though through a standard HTTP request
While this is not a critical vulnerability, it does indeed need to be patched to enforce the expected permission level.
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.