In the new Proxmox VE 9.1 release this should be possible, from the changelog: > OCI images can now be uploaded manually or downloaded from image registries, and then be used as templates for LXC containers.
In the new Proxmox VE 9.1 release this should be possible, from the changelog: > OCI images can now be uploaded manually or downloaded from image registries, and then be used as templates for LXC containers.