Hi,
Welcome to the community!
While project name is settable via analysis properties (sonar.projectName), the other two values aren’t settable as part of your analysis, because by the time PR decoration happens, analysis properties are out of scope.
It should be possible to set them via web services though, once the projects are created in SonarQube.
The best way to master the API is to perform the desired action via the UI and eavesdrop to see which calls the UI made to accomplish the action.
You may also find this guide helpful.
HTH,
Ann