Not able to override AppBarButtonStyle

So, far I have had major luck in overriding PaneButtonStyle and some single style setters for TextBlocks and SolidColorBrush. The trick is to just redefine them in App.Xaml with the same x:key as the original style. Now, I tried the same with AppBarButtonStyle with this: https://stackoverflow.com/a/55470551.

Is there a way to override it with a custom renderer as well, like done here: https://forums.xamarin.com/discussion/151174/can-not-override-pivotheaderitem-uwp#latest, for TabbedPageStyle??