Short story: buy one cheap dongle on Amazon, dump the MAC (00:11:22:AA:BB:CC IIRC; it's been 15 years since I cared) and you have auth to all of the apps everywhere.
Reminder: the Bluetooth logo comes, mostly, from self-certification.
https://www.google.com/search?client=firefox-b-d&q=permissio...
Internally they're all Bluetooth to serial chips, and another pic16xxxx chip which does serial to canbus.
I guess the Bluetooth serial chips probably have programmable Mac addresses, but equally they normally ship with a globally default one unless you flash a different one onto it.