Hi @ArielOBrien, for requests to be considered by Instructure, you need to post it in the Ideas forum.

But why do you need to fill in the missing submission grades with a 0? Canvas allows you to leave the grade as missing, and have it automatically be filled in with a 0:  How do I apply a Missing Submission policy in the Gradebook

Students can have a grade of 0 even if the assignment isn't missing.