Google released this awkwardly named app called edge eloquent recently that does exactly that.

In fact, it cleans up the entire paragraph that you just said, and even if you have meandering thoughts, it cleans those up too.

Actually, this above statement was fully dictated with iOS and it added all the punctuation automatically, so I think that iOS is also doing some of this natively. In fact, I’m on the iOS 27 beta and it seems to be doing an even better job of correcting itself and correcting earlier words and adding punctuation too.