Hi Odelia,
You can use a few different options, like React DevTools, Android Studio or Remote JS Debugging, all options are explained in detail here:
https://docs.mendix.com/refguide/mobile/distributing-mobile-apps/native-debug/
It's a bit of work to set up, but it allows you to inspect your native app the way you would with Chrome DevTools.
Hope this helps!
Hello Odelia,
For the styling of a native application you need to style with react native and not with SCSS like what is in your tag, see also:
https://docs.mendix.com/refguide8/native-styling-refguide/
Beside this Mendix does not really propose a analysing tool like inspect in a browser it does it more by iterating back and forth between the code and the app viewer:
https://docs.mendix.com/howto8/mobile/how-to-use-native-styling/
But maybe this could help:
https://reactnative.dev/docs/debugging
Hope this helps,
Good luck