Envy theme - Collapsible row

[MvdH]

Dear all,

It seems i cannot use the "Collapsible row" functionality in the Envy Theme, but i need to add collapsable content to my products (eg. Ingrediënts, Usage,...). I also cannot use the section "Product Information" in by page builder sections, as i only have Product Pages available;

What am I doing wrong, or can I add this myself?

Thanks!