I don’t think you understand. 4o introduces a new multimodal Sky replacing the old one. They have only released clips of the new voices. It’s never been in the iOS app. The one you refer to is the old voice model. If you listen to the linked video above it’s very obviously not the same voice (I use Sky on iOS btw)

To be honest the new sky is obnoxious and overly emotive. I’m not trying to flirt with my phone.

I've listened to the clips and yes, while 4o Sky is more emotive, it's just that - a more emotive Sky. All the elements that people are pointing to - the husky/raspiness - were present in the pre-4o Sky.