Precedence of Azure AppService settings?

My .NET Core 6 app service has the following setup inside Program.cs:

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllersWithViews();
//builder.Services.AddSingleton... ETC...
var app = builder.Build();

According to docs, it has a default precedence in case of different sources:

1. Command-line arguments
2. Non-prefixed environment variables
3. User secrets
4. appsettings.{Environment}.jsonappsettings.Production.json and appsettings.Development.json.
5. appsettings.json

But I don't see if they mention where AppService settings from the Azure portal configuration get applied.

I expect that Azure portal settings for "MyKey1" would override any of the previous, but it is not happening.

Let's say, I have a appsettings.json with:

{ MyKey1 : "Value1" } 

and, in Azure site config:

MyKey1................Value2

When I deploy the app to the cloud it takes Value1 instead of Value2, for MyKey1.

Is this the normal behavior? What could I be doing wrong?