Just a small addendum to your post -- you shouldn't use react router for react native, you should use react-navigation for that (https://reactnavigation.org/).
Fair enough. I'm not particularly qualified to speak about React Native, having only done toy apps.
I use react-router for native and there is a react-router-native package. You "shouldn't" listen to randos on the internet when they are demanding what you use or don't use.