With plugin version 3.9.0+ you will be prompted during installation of the plugin to enable Crash Reporting (it's off by default).
In older versions it was on by default but it may slow down app startup a bit so now it's disabled by default.
Please read the official docs on what Crash reporting is and what you can do to have a better experience.
There's an option to send logs to Firebase along with the crash in order to add some context. This is however currently problematic on iOS but we'll keep an eye out.