Opt into Dark Mode while building against earlier SDK

Is it possible to enable dark mode support for an app built with an older SDK, but running on an iOS 13 device? It looks like this is possible on MacOS: "If you build your app against an earlier SDK but still want to support Dark Mode, include the NSRequiresAquaSystemAppearance key (with a value of NO) in your app's Info.plist file." https://developer.apple.com/documentation/appkit/nsappearancecustomization/choosing_a_specific_appearance_for_your_macos_app?language=objchttp://