Only if you have a very low bar for what constitutes "in your voice".

Just ask it to write "in the style of" a few famous writers with a recognizable style. It just can't do it. It'll do an awfully cringe attempt at it.

And that's just how bad LLMs are at it. There's a more general problem. If you've ever read a posthumous continuation of a literary series by a different but skilled author, you know what I mean.

For example, "And another thing..." by Eoin Colfer is written to be the final sequel to the Hitchhiker's Guide, after Douglas Adams died. And to their absolute credit, the author Eoin Colfer, in my opinion, pretty much nails Douglas Adams's tone to the extent it is humanly possible to do so. But no matter how close he got, there's a paradox here. Colfer can only replicate Adams's style. But only Adams could add a new element, and it would still be his style. While if Colfer had done exactly the same, he'd have been considered "off".

Anyway, if a human writer can't pull it off, I doubt an LLM can do it.