I've always missed something like this in the industry, when I was trying to integrate Linux desktops in different organizations. There are tools like Ansible and Foreman, but they are not "out of the box" structured like simple policies. For example, it would be more difficult to run an arbitrary code with Bor, compared to Ansible. It's important for the enterprise compliance and we we never had anything like GPOs in the Linux world.
The current target are the desktop machines. That's why the currently implemented features are the most essential ones - desktop environments (KDE, Gnome), browsers ( Firefox, Chrome), security - Polkit.
Unfortunately, it doesn't manage certificates at the current stage of development. There are no webhooks, but thee audit logs may be exported to a syslog server.