> It's frustrating that Apple doesn't have their own Screen Sharing (VNC) application on the iPhone/iPad

At this point it almost feels intentional on Apple's part for not having a first party app, as if having one would be a tacit admission that iPads/iPhones are lesser than actual computers (although the logic does break down since they allow it on Macs).

IIRC they do support weird versions of screen sharing and remote control when on a Facetime call which is convoluted to say the least.