PayPal X Process

Just making sure I have this set-up, trying to get my PayPal X APP accepted.

They said "We would like to see and experience your application payment flow with PayPal’s sandbox during our review"

I have the shop set up for PayPal express and using the global cart. Is that all I need to do?

This application is a tedious one that I think would be good to know for those who are really excited about the chain payments! Looking forward to getting it working though!