If you can see a setting on here that says "metadata" I would love to know where it is. itch support has not yet responded to my emails haha.
Viewing post in Metadata encouragement
I guess you're right that many of these all control a kind of metadata. What I specifically wanted to do was change how link previews for the user appear. For individual games that's controlled under a widget that handles a bunch of metadata stuff (including a tab literally called "metadata") but there doesn't seem to be an equivalent for the user page.