You can use my Sciter if you need native widgets.

Sciter is an HTML/CSS/JS engine with the ability to attach native widgets to DOM elements. So you'll benefit from two worlds: HTML/CSS layout richness and native widgets.

The major problem though is Linux family of OSes in this respect. I have version of Sciter that works directly on X11 or Wayland ( https://sciter.com/sciter-glx-generation-4/ ). Windows and MacOS have clear concept of child windows/widgets but no such things on X11 or Wayland realistically speaking.

So react-native is practically iOS/Android only thing.

FWIW, I was pretty impressed with react-native for mac os: https://github.com/microsoft/react-native-macos

Granted, it doesn't have the same support or attention or community that react-native for iOS does. But it was certainly a refreshing way to build a native app. I think some of the shine has come off it now that a lot of the ideas have been adopted into SwiftUI.