React Native quirk, maybe? I've tested it out on various apps and I don't see it coming from the left, so I assume it's a quirk of React Native (unless I'm not looking properly).

Wait, I just realized you said "UIKit." Derp. Well I don't know, then. 🤷‍♂️

Could still be tbf, I assume this is UIKit wrapped in react native. Probably via expo-ui