Oh cool! I got a set of SoundTouch speakers years ago because they supported simultaneous Bluetooth playback as well as synced cloud service playback. This was in 2018 so options were more limited then. Since it became clear Bose was shutting them down I've moved over to Wiims[1] for managing playback (the SoundTouch app was always kind of odd and hard to manage) - but allowing local control is really nice. Currently you need to hit a button to enable playing from AUX on the soundtouches - they won't stay on the "dumb speaker" mode unless music is playing. Hopefully after this I'll be able to set them up as permanent speakers driven by the wiims.

[1] https://www.wiimhome.com/