Prevent columns from sliding under column 1 in Numbers

Hi,

I have made a 3 column grocery list in numbers with

column 1 to the far left has a number for each row,

column 2 has check boxes, and

column 3 is about an 1 1/2” wide that has particular items typed into it.

This grocery list is displayed and filled out on my iPhone X. The problem is that when I zoom in on this grocery list, column 2 and 3 slide underneath column 1. The ‘freeze’ options for the columns do nothing.

My question is: how can I prevent columns 2 and 3 from sliding under column 1?

Thanks.

Keith