There actually are more issues with this DC than scaling, the sub components are not unique, you probably copied each part from one basic component with 3 nested components,
I understand the need to reuse, but its important to break any connection unless its required,
You could keep a side panel, as you likely require a route to the materials, add their names to attributes in this DC, and use parent! as the connection between the two levels (the generic term “parent” allows for different named parents which occurs via copying or swaps).
as per attached
rework.skp (82.5 KB)
then move,copy it, flip on component (blue) axis if required , make unique, resize the new panel to suit, then right click, scale definition, then make the ply and laminates unique and scale definition each one via outliner (right click menu)
after making unique and scaling definition you can rename the component and its attribute dialog header to suit