Anthony Daniels’ C-3PO will be appearing in an upcoming series, but he’s in a mo-cap suit, instead of a physical suit that he normally wears.
It could be Kenobi, or it could be Andor, or he could be with Skywalker at the end of the Book of Boba Fett, right now it’s unknown.
My guess is the Obi-wan Kenobi series, due to Anakin creating him, and also rumors that he visits Leia, so the droids will be nearby.