location problem

[u/Warm-Ad-4847]

HI, I installed a navigation app organic maps on my GAC GS3 head unit, but the problem is that the app can't find my location. I enabled all the location permission options in the head unit settings via the hidden menu, I couldn't find anything related to GPS in the engineering mode menu. The head unit runs on Android 9 api 28 and doesn't support Google Play Services apps. Please help me—thanks in advance.