Let's look at how to set this up.
Step 1: Select your Checkout page > Go to the ‘Fields’ tab
Next, click on the ‘Products’ field.
Step 2: Click on "Advanced" tab and uncheck/check the checkbox labelled "Hide Product Incrementor" to show/hide the product incrementor.
Step 3: Make sure to click on “Update” and hit the “Save changes” button to publish the changes.