I understand that since updating your iPhone, your position is not showing up on any maps or services that use your GPS. I'm happy to provide some help for this issue.
You've done some great troubleshooting for this issue already. I recommend that you follow the advice provided in the article below:
Improve GPS accuracy
GPS accuracy depends on the number of visible GPS satellites. Locating all visible satellites can take several minutes, with accuracy gradually increasing over time. To improve GPS accuracy:
- Make sure that you've set the date, time, and time zone correctly on the device in Settings > General > Date & Time. If possible, use Set Automatically.
- Keep a clear view in several directions. Walls, vehicle roofs, tall buildings, mountains, and other obstructions can block line of sight to GPS satellites. When this happens, your device uses Wi-Fi or cellular networks to determine your position until the GPS satellites are visible again.
You can also help to improve the accuracy by ensuring that you have Wi-Fi and Bluetooth enabled on your iPhone.
If you continue having this issue, let us know if this happens everywhere, or just in certain locations. Also let us know which iPhone you are using, and what version of iOS you have installed.
Thanks for using the Apple Support Communities. Cheers!