Shameless plug:

Image builder can build up-to-date CentOS Stream 8 (and 9) images for many cloud environments including AWS, Azure, GCP, VMware and KVM (libvirt, OpenStack, OpenShift Virtualization).

Either, you can use our hosted service (needs a RHEL subscription, but the free developer one is just fine): https://console.redhat.com/insights/image-builder

Or you can use the on-premises version: https://www.osbuild.org/guides/user-guide/user-guide.html

If your use-case for Centos images is validating that your production RHEL deployments won't break when a new minor release is out, then I would actually strongly recommend using image builder, because it actually builds images much more similar to what Red Hat produces for RHEL (since Red Hat nowadays uses basically only image builder for all cloud images).

Cheers,

Ondřej