Is Dragon voice still available?
It would have much improved over the last twenty years, if it has.
I’ve be using it with Obi for a long time. Several years ago it was shut down for this sort of app. There were many other services available that worked with Obi. Most were not free but still cheap. Yes, your number will port.
If you’re serious about your privacy then buy a firewall and lock down all of the Google and etc. telemetry sites and ports.
Look at VoIP.ms
Superb service all around.
I don’t even know what Google Voice is. One general problem, though, is that too many people are dumbing down and becoming too attached to bloated, closed source, proprietary applications with too many unneeded features and bugs.
If it’s a VOIP package, then consider voip.ms. It’s much more secure, private, and has many useful features. But it is for grownups, who aren’t afraid of services that don’t provide big marketing or pacifiers.