How do I sotre variables so all scenes can access it

Godot Version

godot 4

Question

Essentially what I want is a set of bools that represent pieces of evidence that you pick up in a level, and then in a seperate scene a script would read those variables and allow you to view those pieces of evidence

For non-persistent data: Autoloads
For persistent data: FileAccess or ConfigFile classes

thanks so much, I was struggling to find a place to start looking for resources