Расширение, позволяющее использовать Live Sharing уже доступно в маркетплейсе Visual Studio Code
https://marketplace.visualstudio.com/items?itemName=MS-vsliveshare.vsliveshare
https://marketplace.visualstudio.com/items?itemName=MS-vsliveshare.vsliveshare
Visualstudio
Live Share - Visual Studio Marketplace
Extension for Visual Studio Code - Real-time collaborative development from the comfort of your favorite tools.