Yes but not sure if it can be access by APIs https://support.apple.com/guide/iphone/hear-whats-on-the-screen-or-typed-iph96b214f0/ios
It's supported. https://developer.apple.com/documentation/avfoundation/speech_synthesis
@satuser what exactly are you requesting - english translations voiceover? Thai voiceover? Is voiceover ad hoc?