My .net MAUI Blazor Hybrid App is receiving push notifications via Firebase cloud messaging. Users can subscribe to a specific "action" which I set on the Topic property of the Message. The notifications is shown on the (android) device. I can click on it and the app is opening.

Now I want to handle the extra data in the message to navigate to a specific page within the app.

I send the message in the following way:

var message = new Message
{
    Notification = new Notification
    {
        Title = title,
        Body = body
        ImageUrl = "..."
    },
    Topic = action,
    Data = new Dictionary
    {
        { "articleId", "123" },
        { "targetPage", "ArticlePage" }
    },
    Android = new AndroidConfig
    {
        Notification = new AndroidNotification
        {
            ClickAction = "OPEN_ARTICLE"
        }
    }
};
            
var response = await FirebaseMessaging.DefaultInstance.SendAsync(message);

In the app the code looks like

protected override void OnNewIntent(Intent? intent)
{
    base.OnNewIntent(intent);
    HandleIntent(intent);
}

But intent.Data and intent.Extra are both null. How can I get the additional data from the dictionary?