I am using Official LineageOS 18.1 since about 1/2 year with regular updates. I believe that microphone problems were not there at that time, but that the performance changed due to an update. Nevertheless all problems are now there also with this OS version and current updates:
- callee gives response that my voice is very muted
- (wired) headset gives eventually a bit higher voice volume, but there is also the problem that the ear volume is very high even at the lowest setting
This is very bad situation for phone usage.