Audio Game is too quiet on Android

The game I'm working on has been built for Android and iOS.

Built using Unity 2018.3.6.

It's features both 3D spatial audio and 2D stereo SFX.
Some people are reporting that Android is much more quiet than iOS. Some are saying it's about the same.
We are using Bose Frames audio-sunglasses for audio. But this is also happening on non-Bose bluetooth audio devices.
Are there any settings in Unity, or PlayerSettings perhaps that might fix this.

If more info is needed, let me know!