HowTo use Jitsi Meet to remotely control another participant's shared screen

So @Freddie although that is the Github page where I can download Windows, Mac, Electron, and Linux packages, there are no instructions about how to build a custom copy of the desktop client. I am looking for the instructions to do that. The code looks like mostly java script. I am not a developer. I am looking for the documentation for the build process.

Did you click the link? It takes you to the section that instructs on how to build your own copy.