App rejected because of Guideline 4.3(a) Design

I am building my 2nd React-Native app which is a very simple Notes app. The functionalities are to be able to add, edit & delete notes. And, on the home page where the user can change the orientation of the notes to be in 2 column like a grid or just a list.

My app has been getting rejected for Minimal design guideline & I don't know what to do to make it more complex.

My first iOS React-Native app was just a single-page Weather app, again that was pretty simple.

So, my question is what do I do? OR is the trick that I just keep doing little changes and try to submit & see which one gets accepted??