It's powered with LineageOS 18.1 (Android 11). Everything is working, using Macrodroid app on my smartphone and automation for WiFi AP activation when vehicle ignition is on. Spotify, Google Maps [and other apps] can have full Internet access. With the N2+ GPIO port I can control vol +/-, track prev/next, luminosity, etc. with the original steering wheel controller. [See second video below for testing this aspect.] For the future, I will replace the amplifier with full digital amplifier.
VU7A, ODROID-XU4 and Speaker Combo
[For power:] I have a small DIY board with some relays, powering the ODROID on after 5 seconds of ignition. It shutdowns properly after 20 seconds of ignition off. I added a 12v regulator to be sure the ODROID will have no damage.