There's GrapheneOS. It's Canadian, not European. I'm not sure where LineageOS is from.
BMW isn't the EU government. Like I said, someone has to actually do it. BMW Actually Did It in a really user hostile way, and that's the best we have. Why is nobody Actually Doing It but good? Or why aren't we buying MNT products?
BMW behaviour is perfectly representative of the EU mentality.
As is your comment. It is basically “someone else should do this properly and I will take the benefits” but not actually willing to put up the hard bit themselves.