Related to: https://forums.zotero.org/discussion/106010/remove-parentheses-from-citations-in-footnotes#latest

Those fields only exist for styles intended for footnotes. damnation linked you to the full list of such styles in your other thread: https://www.zotero.org/styles?format=note&dependent=0

With any of those styles, you'll have the footnote/endnote option. I mentioned a couple of styles that would fit the basic description of what you want in that thread, they're in that list, too.