How can I add icons to collapsible tabs on my product page?

[tasmithola]

Hi,

I have 2 classes of collapsible tabs on my product page (not my doing - default theme settings).

The collapsible tabs in my product description are "with-icon" class. The collapsible tab blocks lower in the page are not.  I want icons in the block at the bottom of the page (Preguntas frequentes).  How do I do that?

Theme is Mode. 

Url is https://olafilter.com/products/ola-water-filter.

[OlegROI]

Hi! Did you found out how to do it?

[tasmithola]

No, sorry. I never did.