You get a badge for the "System Settings" app for both on macOS & iOS. It's very distracting because there is no way to dismiss it, I had to unpin them from the dock.
What's been bugging me is that a recent update (16.2?) means there's no way to dismiss the "Set Up Cellular" prompt in Settings anymore on an iPhone with no SIM.
All of this is, frankly, paternalistic bullshit that treats the user like some kind of idiot or sometimes "mark".