Location Services grayed out
I have an iPhone 6 running iOS 12.1.4 (16D57). I need to change the Location Services for some of my apps, but are unable to turn Location Services on or off because it is grayed out in Settings>Privacy>Location Services.
I followed the recommendations from a previous post to go to Settings>General>Restrictions to check that it is not blocked from there, however, I cannot find the Restrictions menu item on my phone.
What can I do to recover the Restrictions menu item so I can again use Location Services settings?
iPhone 6, iOS 12