Is there a way to automate PDF form filling with Squarespace?

Hi, I’m looking for a way to automate filling out PDF forms, like contracts or invoices, using data collected from Squarespace forms. I came across a service called Instafill.ai that can automatically fill PDF forms, but I’m not sure how to integrate it with Squarespace.

Has anyone found a solution or workaround to automate this process with Squarespace? Any advice would be appreciated. Thanks!