There are ton of great selfhosted tools for tts and similar interfaces.
I used https://github.com/resemble-ai/chatterbox to make my own voice read my epubs, albeit with an american accent which I definitely don't have in real life. It was close enough to put the voice in the uncanny valley according to my wife.
I think most end users will go for a cloud app or website for their needs though, playing around with self-hosting isn't for everyone.