I have an idea that you can steal (would be cool if you send me some of the spoils if it moons lol). This might be right up your alley, Google and Apple devs.

Generated voice profiles (you can use "AI" to sell it to your bosses) to narrate text messages in the sender's voice. Many texts are already sent by speech to text, why not carry that voice to the reciever? Simply recording is not ideal due to the background noise and extra bandwidth, so regenerating the speech on the reciever side seems to be the better approach after generating the speech profile from some sample of initial messages.

I used to work for an assistive tech company that did part of this. For people who have degenerative diseases like ALS, we would create speech profiles for them before they lost their voice so that once they did, their computer-generated voice (through eye tracking software and hardware) would be their own and not a generic voice.