I don’t use proxmox, but i have a pool, with a dataset called downloads which is used by qbittorrent as a hostpath so it can download to it and it’s shared via smb so i have access to it. so yes it’s doable without problems.
Right now i’m running my apps stack inside a systemd nspawn container (scale-jail) managed by portainer with my own compose files. If the new incus lxc system matures a bit i will migrate everything over, so i’m no longer reliant on jailmaker.