Simple repro , create a new proj.

Add a Picker in Xaml

<Picker x:Name="myPicker">
     <Picker.Items>
         <x:String>Option 1</x:String>
         <x:String>Option 2</x:String>
         <x:String>Option 3</x:String>
     </Picker.Items>
</Picker>
<Button Text="Focus Picker" 
        Clicked="OnButtonClicked"/>

Add a Button and add a tapped event to that button

Code-behind

private void OnButtonClicked(object sender, EventArgs e)
{
    myPicker.Focus();
}

This works in iOS , but not in Android in MAUI. This worked in Xamarin, Any workaround to trigger this programmatically in MAUI?