Can I increase custom font size in Adobe Express Webpage? Can't seem to do this!

I'm creating a quick landing page and have created a custom Adobe Express Webpage template. I've applied and linked Adobe fonts (Fat Frank typeface) but can't seem to increase the size of this within the template settings - its pulling through really small and scaling down further for mobile. Can anyone advise if/how to do this?

Seems like it should be a really straightforward thing to do but i can't find any results online that resolves my issue.