I'm not able to install GrapheneOS because of missing udev rules. '51-android.rules' doesn't exist in '/etc/udev/rules.d', only in '/usr/lib/udev/rules.d'. There is just 'google' as entry. If I copy from 'https://github.com/M0Rf30/android-udev-rules.git' there's just 'google 7' in the file and there's a problem with logname and usermod (logname: kein Loginname - usermod: Benutzer »« ist nicht vorhanden.).
And I see many different formats of udev rules, with 'IDvendor', IDproduct', 'serial', username and without-. I don't know what is correct.