Depending on what synthesizer you use, you might be able to get in its internals. Keep in mind that each screen readers can use different synthesizers so that both JAWS and NVDA might use e-speak, windows core voices or something totally different.

In regard to the idea that Jaws is best in class, I'm inclined to disagree. Jaws might be a bit better in MS Office applications and UIA support, I haven't used it for years. However, NVDA has the better web story and until recently it was the screen reader that was actually working with VS Code.