Hyundai and Kia added official GrapheneOS support to their apps months before Volkswagen banned GrapheneOS:

https://discuss.grapheneos.org/d/31697-myhyundai-app-has-official-grapheneos-support

Pressure from Volkswagen customers on them can achieve the same thing. There's no legitimate reason to ban GrapheneOS so they'll undo it with pressure.

myHyundai app has official GrapheneOS support - GrapheneOS Discussion Forum

GrapheneOS discussion forum

GrapheneOS Discussion Forum
Leave a 1 star review for Volkswagen's apps on the Play Store asking them to stop banning GrapheneOS. Explain it's a far more secure operating system and fully possible for them to verify the hardware, OS and their app on it if they insist on doing it. It's far more secure than anything they allow.

@GrapheneOS jsyk this is pretty solidly within the definition of harassment and possibly could get you in legal trouble (not a lawyer, not legal advice) and of course reputational damage.

I've been really concerned with adversarial behavior and negative comments being the entire activity of this account, to be frank, and I really think you should reevaluate what you're doing here. I unfollowed some time ago and am pondering a mute or block if this keeps getting boosted into my feed.