Since iOS 9, Apple uses app thinning to deliver device-specific binaries. A generic "iOS 16 exclusive" IPA may lack the correct slices for your specific iPhone model (e.g., iPhone 14 Pro vs. iPhone SE 2), leading to crashes on launch.
As for exclusive features on iOS 16, Netflix does offer some iOS-specific features, such as: netflix ipa ios 16 exclusive
In reality, most of these videos are recycled content. The IPA files they share are either: Since iOS 9, Apple uses app thinning to