Swipe or Scroll?

Having trouble figuring out how to build this…

I have a simple SIGNUP scenario comp. Maybe 4-6 screens:

SIGNUP (email, name, etc…)
REVIEW (review all info imputed)
OFFER (a thank you for signing up)

I want to have that flow a simple TAP from one to the next…

but want a SWIPE UP to reveal what is happening in the backend (gears, ones and zeros, etc)

I want the SWIPE UP to REVEAL the SCREEN “behind” and then a SWIPE DOWN to get back into the FLOW.

Appreciate any help.

Hey, have you solved this? I am interested in helping you out. That way, I will get much better at it too. Let me know