https://aescripts.com/squirrel/
A hierarchy editor that converts your timeline into an interactive treeview based on layer parenting, much like what you would find in any 3D application.
Squirrel the Layer Tree Browser is a hierarchy editor for After Effects. If you're dealing with complicated rigs made of pickwhip spaghetti, Squirrel is here to help out. Squirrel is an interactive treeview editor much like an object manager or outliner from a 3D platform. Squirrel instantly converts your current comp into a treeview based on parenting requiring no setup! A great organizational tool, Squirrel makes your rigs easy to understand and your layers easy to find!
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