AudioMixers getting a list at startup.

Is there a way to get a list of instantiated AudioMixers once the game has started?
I am trying to avoid having to explicitly define a list of Mixers in a gameObject.
And the Mixers are not in a Resource folder so I can't really get a list of all the mixers in the game either. Can I ? They are just defined in the Project outside resources.

 

Make a ScriptableObject that contains all your mixers dragged into it as a public array, then drag that ScriptableObject instance into anything that needs it.

If you need to load dynamically without a prior reference, then at least the above ScriptableObject has to be in a Resources folder.