Welcome to the Auth0 Community!
The permission alert is a mandatory permission and security feature designed and controlled by Apple that has the purpose of alerting the user that they are about to be directed to a web page.
I was able to find the following Knowledge Article on Using Prefers Ephemeral WebBrowser Session in Auth0 MAUI SDK , which might assist with overcoming the prompt while retaining functionality.
While we do have the following article iOS Permission Popup During Login - Auth0.swift SDK for SWIFT, we currently do not have a clear alternative for MAUI besides the above mentioned resource. This was also briefly mentioned in the following Post : In .NET MAUI app, how can I avoid the iOS permission alert? - #3 by remus.ivan
Hope this helped!
Gerald