Brydge has announced that its 12.3 Pro+ keyboard is now exclusively available at Best Buy. This accessory is rated to turn a Surface Pro tablet into a laptop-like device. It is compatible with the 4 to 7 generations of this Microsoft device.
https://www.notebookcheck.net/Brydge-releases-its-Surface-Pro-matching-keyboard-dock-to-the-US-market.504151.0.html
You can also buy them from Amazon. The one for the Surface Go is already released. I have it, and it does give you a real laptop experience. Just give it a second or 10 to connect after firing up the machine.
Many reviews of this keyboard report that the "fingers" holding the tablet onto the keyboard will break the glass screen from too much pressure against the bottom section of the tablet screen. This review should mention that.