It seems that when choosing the Add Record functionality on an action button in a listing block, it is not visible if there are no records displayed.
My workaround is creating a separate page with a form and using an Open Page action. In this case, the button is visible, though I’m trying to reduce the need for separate pages for form submissions.
Here it is in build mode - the squared button with “Submit a Request” is the Add action; the rounded button with “Submit a Request” label is the Open Page action:
While I have you though – is there a way to do hidden fields the same way we do for forms? I’d like the form submission to be “attached” to the logged-in user without them having to type in their name or email.