Yes, you can change, add, and remove approvers and payers for pending payments.
To make any of these changes:
Go to the ‘Pay’ and then the 'Pending' tab.
Click on the three dots next to the payment.
Select 'Go to payment.'
Press 'CONTINUE' at the bottom of the page.
You can make the changes in the 'Approval workflow' section.
Please remember that you’ll need admin access to apply the changes.