Thanks for coming to the Community with your question!
As of right now, printing bill payment stubs after paying the bills isn't available. I recommend submitting your feedback to our Product Developers so they can consider adding this in the near future.
Here's how:
Go to the Gear (Settings) icon in the top right-hand corner.
Press the Feedback option.
Enter your suggestions.
Tap Next to submit them.
If you have any further questions, don't hesitate to ask. Bye for now!