A few friends and I have noticed that applications that are using React Native, even in the best of situations in optimizing, it still drains battery life faster (sometimes far faster) than something written in Java/Kotlin or ObjC/Swift.
I've noticed a similar thing, but have nothing to go on but my gut instinct. For instance, I'm pretty sure that the food ordering app Ritual is using RN, it just doesn't feel quite native.