A container volume is filled with what the image holds at that path, with its owner and permissions, as Docker does with a new volume. It was only done for the recipes that asked for it. Images that run as a user of their own and do not take PUID, such as Node-RED or Grafana, find their data directory writable and start.
Manyfold, BookStack and NetBox declare the services they need. Lychee and Manyfold install with their own SQLite database.
Folding@home, Healthchecks, NetBird, Speedtest Tracker, Twingate Connector, HA Bridge, ChatGPT Next Web, DDNS Updater and Minisatip explain each value, propose one or leave it to the advanced installation.
Pinchflat gets 1024 MB.
MacRimi