Express/Mobile Checkout Flow

I have been playing around with this all day and can’t find a good solution. Looking at PayPal Complete Payments (PPCP) so customers can skip having to input all their information in during checkout. Version 4.19 BTW. But from what I can tell the customer has to put in their information because the fields are required. I was expecting for this to work like every other shopping cart I have ever used when doing an express checkout. I log in, it inputs all the information for me, I then can choose my shipping option and complete checkout. But that is not the case. Am I missing something? I have been using CS-cart for about 15 years now so this checkout flow is not working as I thought it would. Or is something missing because I just updated from 4.11?

Would love to see an example of how this type of checkout is supposed to work.

Wow!..over a week later and no response to either question I asked on here. This forum doesn’t have the support it used to. Also crazy that there is no documentation on how express payments should work within CS-cart checkout.