Can a factory oil pickup work on aftermarket pans

The factory pickups only work on factory style pans only. Many aftermarket pans, due to the shape of the pan take their own pickup.

For example;
9337, Canton 15-389, and Milodon 30770 use the factory pickup

Canton 15-400, 15-444, and 15-452 takes the 15-401 pickup
Canton 15-450 takes the 15-451 pickup
Milodon 30355 takes the 18425 pickup
and so on.

Make sure you check the notes of each pan to see if it takes a specific oil pickup