How to prevent the touch keyboard in Windows from opening for the Touch machines?

I am building a custom keyboard for my WinUI3 application for Touch machines. I couldn't prevent the default Touch Keyboard from opening when a textbox receives focus. I tried the following approach where I have overridden the OnCreateAutomationPeer

protected override AutomationPeer OnCreateAutomationPeer()
{
    return new FrameworkElementAutomationPeer(this);
}

But this is not working?. I don't want to change any regitry keys to disable it because it will have the effect on entire apps not just my app. Any other way to do this?

Using the CoreInputView.PrimaryViewShowing event works on my end:

<ToggleSwitch
    x:Name="TouchKeyboardToggleSwitch"
    IsOn="True"
    OffContent="Hide"
    OnContent="Show" />
<TextBox />

public SomePage()
{
    InitializeComponent();
    CoreInputView.GetForCurrentView().PrimaryViewShowing += PrimaryViewShowing;
}

private void PrimaryViewShowing(CoreInputView sender, CoreInputViewShowingEventArgs args)
{
    if (TouchKeyboardToggleSwitch.IsOn)
        return;

    _ = args.TryCancel();
}