SelectSystem Servicesby going down the list of apps that use location services on the iPhone.
Notice the mention of the three different arrow icon types mentioned on the screen.
Change the location access to manage the indication on the screen.

OpenSettings>Privacy>Location Servicesand go down the list of apps that need location information.
opt for specific app to manage the location access permission.
UnderAllow Location Access,chooseNeverto block the app from accessing your location and disabling the hollow arrow.

Tip:
Some apps use location services only when they are open or in the background.
What Is the Hollow Arrow on the iPhone?
The hollow arrow is a specific icon used by Location Services on iOS.

Note:
This hollow arrow always indicates that location services is enabled.
The arrow gets filled in when any app or a process requests your iPhones location.
Once the app receives the location information, the arrow returns to a hollow icon again.
In a Message, tapInfo>Share My Location.
The easiest way totrack someone with an iPhoneis to use the Find My app.
Tocheck your iPhone location history, go toSettings>Privacy>Location Services>System Services>Significant Locations.
In Google Maps, tap yourprofile image>Your data in Maps>See & delete activity.