Some non-original Type-C earphones can only be recognized by the OPPO phone on one side, and the other side cannot be recognized (the sound is output from the speaker when it is not recognized)

Countermeasures/Statements:

Sorry to bring you a bad experience.some non-original Type-C earphones in order to save costs,one pin in the earphone is not grounded,which will cause only one side to be recognized.This problem can be solved by turning on the OTG connection 「 settings >Additional settings >OTG connection」.