I do not know much about Intellij's environment. But what I really wanted to know is how I can see all the projects I've created, like in the Eclipse environment.
Below, only one project appears, which I created.
If I close the program and start it again, it will be the same thing.
Eclipse has the concept of Workspace, where you can import several projects for the same Workspace and view all of them at the same time.
Intellij IDEA has an alternative that does not have the name of Workspace, but the goal is the same. For this, you need to create an empty project:
New Project > Empty Project
After this you only need to import the projects (in your case, starting with BuildTools ) as modules of this empty project, simulating a Workspace.