To enable podman to run smoothless on Arch linux, some manual setup is required. Here are the instructions:
$ podman login docker.io
$ sudo touch /etc/subuid /etc/subgid
$ podman pull fedora:latest
$ sudo usermod --add-subuids 100000-165535 --add-subgids 100000-165535 tiago
$ sudo podman system migrate
$ podman pull docker.io/archlinux
$ sudo reboot
IMPORTANT: to build containers, you use buildah.
(reference: https://wiki.archlinux.org/title/Podman)