React Native is able to build abstractions on top of both Android and iOS that uses native UI. Microsoft even have a package for doing a "React Native" for Windows: https://github.com/microsoft/react-native-windows
It's weird that we don't have a unified "React Native Desktop" that would build upon the react-native-windows package and add similar backends for MacOS and Linux. That way we could be building native apps while keeping the stuff developers like from React.
There are such implementations for React Native: https://reactnative.dev/docs/out-of-tree-platforms
React Native desktop on Linux isn't a thing, the GTK backend is abandonned.
So if you want a multiplatform desktop app also supporting Linux, React Native isn't going to cut it.
https://reactnative.dev/docs/out-of-tree-platforms says otherwise
React Native Skia allegedly runs on Linux too
React Native Skia seems abandoned. But maybe this will make React Native on Linux viable
https://github.com/gtkx-org/gtkx
React Native Skia last commit is three years ago.