Populate number of forms equal to selected quantity

How do I make it so that when a quantity is selected, corresponding forms populate according to the quantity selected. Ex: If I choose the number of travelers to 2, 2 sets of fields for name, number, etc populate as seen here:

https://quivertreeworld.com/make-a-reservation.php

This is the site I am transferring the previous site over to:
https://sandbox.parammedia.com/plan_a_trip/quivertree-booking-form/

https://www.ads-software.com/plugins/visual-form-builder/