How to check permissions of a non sudoers user with full root access?

doas is a sudo-like command recently packaged in Debian 12, Ubuntu Jammy (universe) and some other Linux distros. A non sudoers user (doasuser) can be added to /etc/doas.conf to be granted root access. Detailed instructions on Debian Wiki . Problem: The doasuser isn't a member of any group. If you grant root access to doasuser, this information isn't synchronized with sudo (seen as unprivileged user). doas only comes with a binary program, a PAM configuration file and /etc/doas.conf. Apart from /etc/doas.conf, a superuser can't find the permissions of the doasuser. Is there any command line to check the permissions of doasuser?