Turn off Location Services in Settings > Privacy & Security > Location Services
Change location permissions for specific apps in Settings > Privacy & Security > Location Services
Disable Precise Location for an app in its location settings
Set a different region in Settings > General > Language & Region
Use a VPN to change your IP-based location
Use a computer-based location spoofing tool with your iPhone
Use developer tools or Xcode to simulate a location on a test device
Restart the iPhone after changing location-related settings