It is not possible that it is saving the gdscript in the pck and that it even includes the original comments.
Even the gdscript can be read with the notepad inside the pck.
This should be the most important thing in Godot's future roadmap.
The code region folding has been merged into the master branch. What it means is that you no longer have to do this, as it should be included in the next major version of Godot 4.2 (Unless something real bad happens).