Day of Month in Form Generator

I am trying to build a client side dashboard for monthly billing. The concept is the customer can choose the day of the month they are billed for a monthly subscription (e.g the first of the month). I’m trying to build a form with Bootstrap 5 Form Generator, with the Field Type as Date. However, this does not seem to solve what I’m trying to accomplish. The end goal is the client will be able to view on the dashboard the day of the month they will be charged, and transaction processes that day.

Does Bootstrap 5 Form Generator allow me to do this?