There is a great thread describing the issue, but by some reason moderators closed it without any solution of that bug fix.
In short - I am trying to enable IAP in the project (I did it many times some time ago in older Unity versions) but trying to input Android public key I receive authorization error message
In the closed thread I mentioned was said - you can set the key in Unity Dashboard, what actually I did, but I still see the empty text field there, the public key was set only in dashboard, but Unity editor doesn’t recognize it by some reason!
How to make things work finally? I am on Unity 2021.3.11f1
P.S. forgot to show how it looks when just open Servies > IAP after Unity restart