Rive artboards slow to load on ReactNative app

Hi, we have an app in beta test using rive artboards and animations, and they take noticeable time to load, how can we improve this? The animals below are all imported with Rive (animals in the round button -> animals to select on a square background and animals running / celebrating. They are the same riv file on different artboards, some nested artboards.

We're using reactNative with Expo.

Look below at 3 seconds, 8 seconds and 15 seconds:

Thank you!