When using the Maximizer, buyable items (potions) are missing from suggestions.
This is true in Softcore (I have not tested HC) when the Equipment: radio button is set to 'don't check' or 'on hand'.
If you the Equipment: option to 'creatable' or 'pullable/buyable', then buyable potions will show up in the list.
I noticed this in my last few runs where I was maximizing muscle, buy Ben-Gal Balm was not suggested. I could buy it and use it manually, but it would not show up in the list unless I changed the Equipment: option.
From going through change lists and trying previous builds, I believe this is tied to 18062: Experimental - In Softcore, Maximizer will suggest pulling items from storage