Forms - How to use the Select List column type but allow for new options to be added from the form?

I’m trying to build a form where folks can either select an option from an existing list or add a new option, ideally with the new option being added to the existing list for the next user.

I have “Quick Add Options” enabled in both the form and the table, but am still unable to add a new option from the form directly

However, I can add a new option by manually editing that cell in the table itself, not the form.