For the People still struggling to get NativeWind working with Expo i have a solution.

Attach any missing metro.config.js file for your bundler in root directory.

Update App.json to use metro bundler.

Import missing global CSS directives in your main Typescript/Javascript file.

You can refer this Pull Request i did for someone suffering with the same issue.

https://github.com/Danncode10/ui-starter-expo-sdk-latest/pull/2

Cheers!