How do you remove root access to SSH after an install and before you do your online update?
Edit /etc/sshd/sshd_config, find PermitRootLogin yes and change it to PermitRootLogin no, then systemctl restart sshd.
See here:
https://en.opensuse.org/SDB:Configure_openSSH#Limit_by_Users
But what does this have to do with online updates?
Online update from what to what?