Can we set custom volume for custom sound in push notification ?

Hi,
I am working on meteor app which has push notification functionality and I used raix/push.
It's working perfectly and also implemented custom sound functionality as well.

But I want to implement **CUSTOM VOLUME** for custom notification sound. Which is independent of system sound profile.(Sound/Mute/Vibrate whatever is set on the device).

Also whenever user is on call with someone and my app receives notification then it is required to hear app notification sound in ear with custom volume. currently there is no sound if notification is received while a user is on phone call

Please let me know if any solution for this.

The issue names no files, tests, or entry points; start by locating the push-notification sound handling in raix/push and checking the platform-specific behavior. Determine whether independent volume during normal use and phone calls is a supported, scoped change, and define the expected behavior before implementation.

Written by the indexing model from the issue text.