Hey ​@grace_j would you mind providing further context?

What do you mean by Instagram Grid/Preview?

Mike, Consultant @ Automatic Nation

If my calendar looks like the first image, is there a way to see a grid preview of what it would look like on Instagram like the second image?

Oh, I get the point now.
Not exactly to be honest. However, you can set up a Gallery view and sort it in a way that would look similar, but not exactly the same.

Take a look at Gallery views/pages here.

Mike, Consultant @ Automatic Nation