I take voice acting classes and am in a number of voice acting Discords and... I doubt it. Voice acting's fun, and there's aspects of it that might help, but the focus is pretty different.
That said, to OP's question: I've never seen masculinizing voice training offered, anywhere. It's all the other way, because there's an assumption that people will do HRT and that for most transmascs the resulting change will be enough. I've contemplated it myself, because my voice is still pretty high and my speech patterns get me ma'amed on the phone, but it seems to be pretty rarely offered.
I take voice acting classes and am in a number of voice acting Discords and... I doubt it. Voice acting's fun, and there's aspects of it that might help, but the focus is pretty different.
That said, to OP's question: I've never seen masculinizing voice training offered, anywhere. It's all the other way, because there's an assumption that people will do HRT and that for most transmascs the resulting change will be enough. I've contemplated it myself, because my voice is still pretty high and my speech patterns get me ma'amed on the phone, but it seems to be pretty rarely offered.