How to play music on my BT mono headset without having to jailbreak it!

Well, I am disappointed so far that I cannot use my mono BT headset to play audio through other than anwering my phone with.

I am aware of the jailbreak version using cydia which I do not want to use.

I am aware of using Voice Memos as it will play out to a mono BT headset.

I also know that through accessibility features, you can turn sound to Mono.

Unfortunately, these either don’t work or offer the feature that I would expect from a Company like Apple. Can anyone help me?