Hello,
I have the Power Module combo so just 1 frontal microphone.
But the recorded audio level is very very low and I can't find any settings to adjust the audio level.
Is this normal or am I missing something?
Thanks

Here's an extensive test of the audio from the camera module alone - if you think yours is significantly different (if you can tell) then maybe yours has a defect.  I don't remember anyone else having a significant issue with audio level.  It's not my video, just one I happened to watch a few minutes ago.

It seems lower than the one in the video.
If i record with my Pocket2 and Action2 at the same time, i have to deal up my speaker from 35% to 60% to hear a similar volume level.

So anyway, could you confirm that there are no Audio options at all without the Screen module? to control the single front mic

The only level control that I am aware of is only available when external mics are connected.