Why the size of a Ionic App for iOS is much bigger than the Android one?

Hi,
I have an Ionic4 App which contains some gifs, a pair of small gif animation and many Cordova plugins.
Now, the same app, on the Android store is 30MB, while on the Apple store is almost 300MB.
How is it possible?
I use this command to build the app on iOS:
ionic cordova build ios --prod --release

and this command on Android:
ionic cordova build --prod --release android

Is this normal?
Is there a way to optimize the iOS version?

Thank you very much

Claudio