Support added in EL >= 9.3 for automatic reboot after installing updates (when needed).
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.3_release_notes/new-features#new-features-software-management
We need to install dnf-automatic package and modify /etc/dnf/automatic.conf.
dnf-automatic
/etc/dnf/automatic.conf
It's a bit quiet in here.