I have upgraded ovirt-engine to 4.4.10.

thsese are my steps:
dnf --disablerepo appstream --disablerepo baseos --disablerepo powertools --disablerepo ovirt-4.4-centos-gluster8 --disablerepo ovirt-4.4-centos-ovirt44 --disablerepo ovirt-4.4-centos-opstools --disablerepo ovirt-4.4-centos-nfv-openvswitch --disablerepo ovirt-4.4-openstack-victoria install centos-release-stream
dnf --disablerepo appstream --disablerepo baseos --disablerepo powertools --disablerepo ovirt-4.4-centos-gluster8 --disablerepo ovirt-4.4-centos-ovirt44 --disablerepo ovirt-4.4-centos-opstools --disablerepo ovirt-4.4-centos-nfv-openvswitch --disablerepo ovirt-4.4-openstack-victoria swap centos-{linux,stream}-repos
dnf install --disablerepo='*' https://resources.ovirt.org/pub/yum-repo/ovirt-release44.rpm
--------------------------------------------------------
#upgrade the engine
engine-upgrade-check
.....
--------------------------------------------------------
dnf distro-sync -x ansible-core    #ansible will got some issue in current repos.
reboot

On Wed, 23 Feb 2022, Adam Xu wrote:

How can we convert centos 8 to centos 8 stream? Thanks.

dnf install centos-release-stream
dnf swap centos-{linux,stream}-repos
dnf distro-sync

Note that the last command is effectively a yum update that syncs your packages with all of the installed repos, so make sure you install the latest ovirt-release44 package with the working mirror URLs before you run it, or you might end up with some (or all) oVirt packages removed.