Do I need to create a new route if I want to store a new object on a nested object?

Hi!

I am try to learn Mongo and NodeJs and I’m using the Post has many Comments data model to practice.

I already created a route for my Post, my question is, do I need to create a separate route file for the Comments schema if I want to store those objects under a Post object in an array?

This is the current data model I’m working with.

Thanks in advance!