Kitchen Sink slow drain but it's NOT caused by a clogged p-trap, nor the main drain pipeline

The 35 Parts of a Kitchen Sink (Detailed Diagram)

REALINN Under Sink Organizer, Pull Out Cabinet Organizer 2 Tier Slide Out Sink Shelf Cabinet Storage Shelves, Under Sink Storage for Kitchen Bathroom Cabinet

Under Sink Organizers and Storage 2 Pack, 2 Tier Sliding Under Kitchen Sink Storage Bathroom Cabinet Organizer Multi-Purpose Under Sink Shelf for Kitchen Bathroom with 8 Hooks & 2 Hanging Cups, Black