Add form to product page to capture specific information for each customer

G’day,

I need to add a form to each of the product pages so our customers can input 3 different pieces of information (a 16 digit voucher number, a date of birth, and full name) when they place an order.

When these details are entered our customers get the cost of their order paid for by a government organization as part of a funded program.

How can I collect the 3 data points above so that the information is stored with the customer’s order?

Here’s an example of another site that has what we need. (The other site is not a Shopify based store)

https://theseedcreativeworkshops.com/Textiles-Art-Supply-Kit-&-Instructional-Lessons-p251164924