Most of the times we get crash reports from playstore/appstore consoles for native component exceptions.
Crashlytics is a good platform for getting detailed crash reports.
For getting usage analytics and push notifications we had previously experimented with clevertap analytics sdk for which react native module is not available but can be easily ported using Native modules in react native.
I guess firebase now provides detailed in app analytics/crash reporting and react-native-firestack module can easily reduce the efforts of writing native modules. I am actually planning to use the same in my upcoming projects.