Adding an Item to ObservableCollection is not updating CollectionView in .NET MAUI app

Question

I found quite a few questions/answers about this here on SO but I'm confused about something. Here's one example: Observablecollection not updating list, when an item gets added

Shouldn't adding a new item to an ObservableCollection<T> automatically trigger a UI update? A lot of people are suggesting solutions that indicate developer should manually call NotifyPropertyChanged() but if that's the case, why use an ObservableCollection in the first place? Again, I'm specifically talking about adding a new item to the ObservableCollection and NOT updating a property of an existing item.

Using the following code, I add a brand new item to my ObservableCollection<Student> and there's no change in the UI even though the new item is added to the ObservableCollection.

Here's my view model code:

public partial Class MyViewModel : ObservableObject
{
    //...
    public ObservableCollection<Student> Students { get; } = new();
    
    [RelayCommand]
    void AddStudent(Student student)
    {
        Students.Add(student);
    }
}

And my CollectionView binds to Students like so:

<CollectionView
    ItemsSource={Binding Students}>
    <!-- Omitted for brevity -->
</CollectionView>