How to conditionally hide and show fields to the attendee in the registration form based on their entry in a previous field?

In the event dashboard, click on "Registrations" from the side bar.

From the left-hand side menu, select “Setup Form” under Content.

Click on the visibility icon in the form field you want to make available to specific ticket types. This will open the edit field form with the visibility tab selected.

Ensure the visible check box is checked.

Now open the advanced section.