I don't understand what “native” is supposed to mean for a JS (web?) app. It seems rather senseless.
the ui is native
You mean, like, everything that runs in your browser has a “native” UI (namely that of your browser)? That seems to make the term “native” mean nothing at all. What runs in your browser and doesn't use your browser's UI?
React Native apps don't run in a browser. That's kind of the whole point...