podman/docs/source/markdown/options/subuidname.md

####> This option file is used in: ####> podman create, pod clone, pod create, run ####> If file is edited, make sure the changes ####> are applicable to all of those.

--subuidname=name

Run the container in a new user namespace using the map with name in the /etc/subuid file. If running rootless, the user needs to have the right to use the mapping. See subuid(5). This flag conflicts with --userns. Together with --uidmap it acts as if --uidmap was passed with all mappings of the name user in /etc/subuid.