[bl-passport]

Does anyone know, how to screen record with an internal sound and microphone?
There are number of applications, I tried AZ recorder, Mobizen but they record only the screen, not internal sound. I read somewhere that it is because I have Android 9, not Android 10. Or is it problem of nokia 8?
Do you know, what application would enable it?

[Rukbat]

Only if you can feed the mic to the app creating the sound. You're either recording the mic channel or the media channel - you can't record them both at once. (If you feed the mic to the app, the sound that the mic picks up is echoed on the media channel by the app.)