I have high accuracy alreadyHi All, I share my founds to fix the GPS problem. I've applied this two changes:
1. Give necessary permissions to Google Maps or whatever application you use to navigate. Open Security app --> Permissions --> Permissions --> Find the app (in my case Google maps) --> be sure you have green check on "Get location info (get precise location)". I've configured location mode as "High accuracy".
2. Open Security app again --> Battery --> App battery saver --> Find the application you want to use and click on it --> Set "no restrictions" for Background settings (Battery saver doesn't restrict app's activity) and be sure that location in background is allowed.
My indications have been created using Xiaomi.eu rom 6.10.27, your menus could be in a different place if you use a different rom version.
Hope it will helpful to fix the GPS problem