Issues related to recording and replaying may include,

The recording quality is not good 

1. Check if any dust is stuck on the outlet hole of the speaker, causing a reduction in volume 
2. It may be caused by a non-stock ROM, we suggest flashing back to the official OxygenOS ROM.

Cannot recording

1. This maybe caused by physical damage, especially near the microphone area. It is recommended to apply for after-sales service