Supplier Registration - Add validation to the Attachment

Summary:

Can I enforce a rule in Supplier Registration requiring suppliers to upload at least two attachments? I’d like to know if this validation can be implemented by customizing the page using Visual Builder Studio (VBS).

Content (please ensure you mask any confidential information):

In our Supplier Registration process, we need to ensure that suppliers upload a minimum of two attachments. I am exploring whether it is possible to implement this validation by customizing the page in Visual Builder Studio (VBS). Specifically, I’d like to add a check that prevents submission if fewer than two attachments are uploaded.