Podman stores images per-user. After creating a system environment with sudo, configure rootless Podman to read the rootful image store by adding this line to the [storage.options] section of /etc/containers/storage.conf:

No Podman restart is needed; the setting is re-read on every invocation.

Apptainer needs no analogous configuration: .sif files are plain files on disk, so a system environment dropped under /usr/local/share/morloc/environments/<env>/ is readable by every user without daemon or socket configuration. This is the natural deployment pattern on shared HPC filesystems.