Does it help to reinstall the certificate in dovecot?
runagent -m mail1 install-certificate dovecot
That should put the right cert to /home/mail1/.local/share/containers/storage/volumes/dovecot-cert/_data/.
Traefik stores it’s certs in one file in /etc/traefik/acme/acme.json, to access it in the container using vi you could use following command:
runagent -m traefik1 podman exec -ti traefik vi /etc/traefik/acme/acme.json