Answer by Liyun Zhang - MSFT for .NET Maui - Update UI from bluetooth events

The method is not async so you can just call it directly. Such as:

private void OnDiscoveryFinished(){    isDiscovering = false;}

And for the ObservableCollection, you can use the CollectionChanged event:

protected override void OnInitialized(){    base.OnInitialized();    devices.CollectionChanged += (s, e) =>    {        StateHasChanged();    };}