How to use firebase TestLab with react native
Currently, Robo only allows you to pre-fill form fields that can be identified uniquely by native Android resource IDs (like an EditText widget). I'm not too familiar with react native, but it looks like it will generate a native Android app. That's probably why Robo can navigate your app at all -- it's using some native Android widgets to implement your UI. But if you can get React to use native Android resource IDs (or figure out which resource IDs are already being used), and reference those names in your test, that might work.