Add a "upload a file" field to a product detail page, before "add to cart" button

If possible, adding a "upload a file" field below product variants dropdowns and above the ‘add to cart’ button on a product page for personalized orders or order customization.

Squarespace has a "Custom Form" feature at the bottom of a Product Detail Page, allowing us to create a custom form before checkout but it doesn’t include the “upload a file” field like the Form block.

Thank you.