podman does not autostart containers after boot. You have to manually start them, or write a start script. Or create a systemd unit for each of them.
I have not yet tried podman, but I know that podman-compose
used to have an option to generate systemd units for your pods:
https://docs.podman.io/en/latest/markdown/podman-generate-systemd.1.html
Still, that option has been deprecated in favour of Podman Quadlet https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html
Sigh... unzips pants