After searching for five minutes for the topic in which the Bluetooth music player option was mentioned, I'll post here. (There are FAR too many 2018 Leaf topics!)
I finally tried the Bluetooth source with Google Play Music opened on my phone, and... it works great! Song info, full control, and it opened fast. The sound quality, as with all BT devices, is a little flatter than with more direct sources, but it sounds good enough for me! I have a Sirius-XM subscription until a year from August, but this gives me a great alternative to listening to banal (and worse - looking at you, Richard Blade!) "DJs" and relentless self-promotion (ditto, Blade), along with limited "station" choices that interest me. I've been using Play Music in my bedroom and on my bicycles for years, and there was another, unexpected benefit: my phone received a whole bunch of "new" music that I hadn't heard on the bikes. I theorize that it wasn't updating much because my rural bike route has marginal cell reception.
So to whoever suggested it, in whatever topic it occurred: thanks!
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.