Meanwhile my car - Vauxhall Zafira Tourer - from 2018 has a broken Android Auto, they stopped offering the map updates for sat nav in, like, 2019 and that update system is locked. AFAICT you need an encrypted thumb drive.

It's my first car with built in satnav, so it was not something I thought to test. A working Android Auto would be great compared to 10+ years out of date maps.