Hang on.
I have a DJI RC Pro that came with my Mavic 3T and when screen recording, it has a built in microphone and I am able to make audio notes while screen recording.
I think the microphone is on one side of the data ports on the bottom edge of the remote.
Audio quality isnt great - i am not sure if its the audio bitrate of the screen recording application, or the microphone itself.
- Actually i just checked. AAC Mono 96kbps so audio isnt being recorded at modern CD quality, but still a higher bitrate than we used to call a good music quality mp3 (64kbps per channel) so I am not sure.
It could be the recording program is recording at a higher bitrate than the digital audio stream coming in from the microphone.
Here is a recording of me testing the drone when i first got it to see how the thermal camera worked a couple of days ago at our city new years eve beach party.
Thats the microphone built into my DJI RC Pro