Whats your opinion on accents for callbacks?

I’ve got a callback coming up for a part that cononically has a southern accent, let’s say it’s for Violet as an example. Her dialogue and music is all done with said accent, so do you automatically do it in call backs? Or wait if they ask you? I normally practice it both ways and ask when I’m in the room, but I’ve had people tell me only to use an accent if asked. Wondering what your thoughts are.

I’d prefer answers from those who are also working professionally:)