TLDR: Konfir validates income information but does not replace the need for standard proof of income and employment references.
Konfir and Proof of Income
Using Konfir does not replace the need to evidence your income.
You will still need to provide your standard proof of income (via bank statements or Open Banking) and employment references. Konfir is used alongside these to validate the information you have shared. It does not replace any other part of your application.