[Podman] mount loop ?

Hi guys. I'm trying to /mount/ inside a rootfull container but I fail: -> $ mount /_forISOsToImport/CentOS-Stream-10-latest-x86_64-dvd1.iso /mnt/ -o loop mount: /mnt/: mount failed: Operation not permitted. Am I missing something obvious from container config, perhaps some *capabiities*? many thanks, L.