Visual Scripting Application variables replacement

To keep things short, I'm using the Visual Scripting package with the sole purpose of keeping application-wide variables. For example, when the player do activates like a button in a scene, they can go to another and the door will be open for them.

However, using a package like this for this sole purpose seems like overkill, so I'm looking for packages that aim to solve this kind of problem specifically, so I can save time from building a solution on my own.

Thanks you in advance.