Headding mobile/PC

Hi support team,

on my web page I did want to have 3 testimonials per row on PC but 1 on mobile.
I did implement the code you proposed however I cannot input heading for this content.

Issue is that i dupplicate the template but your content hides only the testimonials not the heading. Therefore I end up with correct display on mobile and PC but there is always one additional heading that has no testimonials in it.