Theme block: how many products appear
In the theme editor, select the Comparison table app block. Use Maximum products to show to cap how many products appear in the comparison columns. You can choose a value from 1 through 20.
This limit applies whether the columns are filled from related products or from your Compare with list.
Lowering the number keeps wide tables manageable on small screens. Raising it shows more columns when enough products are available.
If you use manual Compare with and saved twenty products but the block shows fewer, check Maximum products to show first.