No that's not how it works. IDEA has its own project files (*.iml, .idea), separate from Maven. We are talking about IDE projects which are separate from Maven.
Yes that's configuration for the IDE. But the project itself is configured off of Maven, the project files for the IDE are ADDITIONAL settings for the IDE itself.
For example in CLion you can't create a new target from the IDE, you have to edit the cmake file.
For example in CLion you can't create a new target from the IDE, you have to edit the cmake file.