And than goto customer payment. There you can make one payment with one bank partial amount. And than goto customer payment again and make the balance amount. But this time select another bank to complete it.

This way one invoice can be paid by two payments
Even more than 2 payment you can do for a single invoice

What are the steps that needs to be taken if I want to split payment between my platform and vendor. What should be the structure of invoice? Do I need to generate two invoices ?