Yeah I was a little confused at this line; as far as I can tell you can restart containers that are a part of a Podman pod without restarting the whole pod just fine. I just verified this on one of my MicroOS boxes running Podman v5.7.1 .
Podman was changing pretty fast for a while so it could be an older version thing, though I'd assume FCOS is on Podman 5 by now.