Change loader to white / use a JPG?

So I’ve got a loading screen that uses a photo. If I made it into a PNG, it’d be 740kb (vs 80kb). The jpg seems to be working fine besides the warning. Any reason for requiring it to be a png? Possible to silence that warning?

Also, is it possible to change the loader color to white?

EDIT:

The following code works in expo.json!

"loading": {
    "loadingIndicatorStyleExperimental": "light"
},

Hey @gregblass did you test on Android too?

I did not, the app is for doctors and the ones we surveyed overwhelmingly used iPhones. So we’re building the MVP on iOS first and then spending time to roll out Android once we prove the concept.