which versions are you using (SonarQube, Scanner, Plugin, and any relevant extension)
sonarqube 9.9.0.65466 developer edition
how is SonarQube deployed: zip, Docker, Helm
zip
I couldnt the find the project ID for the DevOps Platform integration although under sonarqube website says it should be on the project overview page as shown in the picture below.
just found out an even easier way to get the project id: just see the HTML content of the gitlab page hosting your project. There is an input with a field called project_id, e.g: