If you do it via React Native turbo modules, it is already possible, either using craby (1) or using uniffi-bindgen-react-native (2).

(1) https://github.com/leegeunhyeok/craby

(2) https://github.com/jhugman/uniffi-bindgen-react-native

My understanding is that this only gives you access to C++ TurboModules? Binding to C++ is already easy in Rust (and odten Rust itself is a better choice for these "cross-platform business logic" kind of modules anyway). The value here is in unlocking bindings to the native platform APIs (which are mostly Java/Kotlin/Objc/Swift)