This is a replacement bumper for the bottom freezer sliding drawer rail. It prevents the metal rails from making a noise as the drawer is closed.
It is designed for my unit, a LG LDC22778 (circa 2012), but I wouldn't be surprised if other models of the same era use the same piece.
You can see the original one (white) and replacement one (orange) together in the picture.
Print it in flex material (otherwise it won't solve the sound issue!)
The author marked this model as their own original creation.