Here's my thought on Podman - ArchWiki
I kept running into limits in the number of subuid and subgid's I had on my system by default. As always thank the arch wiki guide for having the most comprehensive yet consice guide to setup podman.
What I needed to do to fix the error.
usermod --add-subuids 100000-165535 --add-subgids 100000-165535 username