How can I create an object to display on-screen messages that have been texted in to a specific phone number?

I'll try and keep it short, but am happy to try and answer any questions if you have any.

I stream games for fun on Kick and Twitch. At first, part of some peoples' draw was the humorous commentary from my wife as I play.

We thought it might be a funny sort of gag to have her "text in" her commentary and have it pop up on screen. I'm not sure what apps or tools would be necessary, and whatever approach would be best - having her text like a Google Voice phone number?