Changing default bluetooth speaker

[beej777]

Plan

Premium / Family

Country

UK

Device

iPhone 13

Operating System

iOS 17.6.1

My Question or Issue

In my car I have two Bluetooth connections to my iPhone at the same time. One is to the OEM phone handsfree system in the car and the other is to a TPLink Bluetooth receiver which I use for streaming audio from Spotify and is plugged into the Aux input on my car stereo.

I have to use the two different connections due to restrictions with the car audio system.

Whenever I start Spotify it always defaults to selecting the MyCar (phone handsfree) Bluetooth output, which doesn't work for audio streaming. I can manually select the TPLink to stream audio and this works fine, but I have to do it every single time which is frustrating. 

Is there any way that I can change this so that the Spotify app defaults to using the TPLink for audio output? I have checked the settings and searched online, but I can't find any information. I can't really work out why it is prioritising the MyCar connection - unless it's as simple as it being in alphabetical order?

Thanks!