NS8 is OS agnostic, the goal is to be installed over different family OS and it could be really difficult to offer operating system management like we did with NS7. I experienced since some time cockpit in rocky but I feel it won’t be different with debian
You can manage services
you can manage storage
you have a terminal
you can manage software updates
you can manage networking settings with firewall
…
well it worth to test it
dnf install cockpit
systemctl enable --now cockpit.socket
firewall-cmd --permanent --zone=public --add-service=cockpit
firewall-cmd --reload
vim /etc/cockpit/disallowed-users # remove root
systemctl restart cockpit.socket