I've been trying to add my credits for Jack Ryan and each time I add nothing comes through. Ive waited 18 days twice now with no credits being added. After working for a year on the show I am due a credit.
IMDb doesn't decide who is due credit, regardless of work put in. They document who is in the on screen credits, or not. The producers decide that. If you are in the credits, you'll get listed. I don't notice a Matthew Badham in the database with any credits listed. So, if this is your first credit and your name does not appear on screen, you will not be eligible for a listing of an "uncredited" role.
You might have to wait until you can provide proof your name is on screen, like a screen grab, and add it to you submission.