React Native TTS - Set default Voice

I have some trouble using React Native library for Text To Speech. https://www.npmjs.com/package/react-native-tts

I was not able to choice Italian Voices different than Alice. On the iPhone (iOS 14+) were listed : Alice, Federica, Luca, but on the library is present only Alice.

How can I solve this problem and select the other voices ?

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