Just an advisory if you are on RHEL9/Alma9/Rocky9 and upgrade to Nextcloud 30:
if you run Nextcloud 30 (native baremetal install, not docker) you will notice that a warning starts to appear that Mariadb 10.5 has been detected and that an update should be considered.
Luckily there is a module stream for it, run:
dnf module install mariadb:10.11/server
you should also update the DB’s, otherwise things like Virtualmin Backups will fail:
mysql_upgrade -u root -p
After this the warning message disappears and you might pass all checks again.