Another useful pin from the old thread:
For controllers: It seems that in the latest retroarch, the automap feature is automatically enabled, so it’s best to turn it off before doing button mapping.
- To disable automap:
Open Applications → RetroArch → Settings → Input → Auto Config-> Swich Off Then back to Main Menu of RetroArch → Configuration File → Save Current Configuration
- To map button:
Bluetooth App - #3 by nvcuong1312