The My SEAT App (seems to be very near to the VW equivalent) V2.17 stopped working today and told me to update it. And as expected the V2.18 does also not work. It says "App is under maintenance", but GrapheneOS notifies me that this app uses the Device Integrity Check.
I am sure that this check is failing just like with VW app.
Wrote an email to SEAT Connect support, directly adressing the sudden incompatibility of their app with my secure OS.
A quick solution is unrealistic, isn't it?