The market for mobile developers is larger than ever. There’s a good chance that the reason you started learning iOS development in the first place was to get a full-time job building apps.
If that is your motivation, you may have looked at job boards and already had feelings of regret about your decision when you see a major requirement many companies ask for:
”I can give up the platform I love for the platform that gets me paid, right?” [cue tiny piece of soul dying inside]
I’m here to say, you shouldn’t need to. There is more than enough interest in native iOS development that — even if you don’t learn React Native at all — you will have no problem finding a job.