Input (node) access e.g.: to change the mic gain

[nonameplum]

Tell us about your request

What do you want us to build?

We would like to at least have a possibility to change the mic gain. We have tried to do that by using AVAudioEngine.inputNode but it seems like it is not possible as the Chime SDK probably internally is processing the input without giving any possibility to mix with that from the outside.
Could the Chime SDK expose in some way input (node) - stream - whatsoever, that would allows e.g. increase the input volume?

Tell us about the problem you are trying to solve and why is it hard?

We need to suport a Bluetooth headset that has a mic with very low mic gain, and we would like to overcome that issue by giving some input audio processing.

How are you currently solving a problem?

Currently, we are stuck.

Additional context

N/A