Thank you for your suggestion. While a native viewer for macOS is a nice idea, currently, there is no native MacOS viewer planned for the foreseeable future, Not many users are asking for this feature and thus, this cannot be implemented anytime soon. Another reason is that the current iOS app (iPhone/iPad) already serves as a native viewer on all new Mac devices.
Thanks for your attention. iOS app on macOS could not support native resoluion. Instead, it only have a scale option which is not beautiful on a bigger screen.