Hi, I am having the same issue with my OnePlus 9 ( Microphone of Huawei Freebuds Pro 4 not used over Bluetooth - #2 by michix ). I tried with three (found another Headset) different Bluetooth headsets - both did not work with the microphone.
For testing I am using “Record Equalizer* where I can also select the input source. Here, I see that the microphone of the headset when selected does not yield any input.
I already searched the issues of Lineage without any results. Where would I address this issue for iodéOS? Which GitLab repo would be appropriate?