How Do I change font size on auto layout?

For some reason I can change the size of everything but the title in the auto layout sections. Currently the title size is really small and almost unreadable on desktop. Is there a way to add CSS which adjusts the font size in this section? I used inspect element and changed the <strong> html to <h2> and that adjusted the size but I can't figure out how to translate that to CSS

Hi. Can you share link to page where you use auto layout? We can check easier