Order collection algorithm through all view controllers and data transfer through controllers. How to decide?

Question

iOS

I wanted to ask how they make an application where an order is collected on 1-4 view controller in parts 4-5 controller registration or authorization and 6 controller shows the order in full and a button for payment.
The problem is that you cannot transfer data through one controller (by jumping), only drag it with you through all the controllers, but it seems to me that this is not correct. What do you do in such cases?
SWIFT language

Answer 1

Use singleton it is available everywhere.