Hello. I am not sure why heading is not shown at your end, but I can assure you that the code was entirely entered and saved exactly as you specified in
appearance/editor
for kleo child and style.css.
Currently Abel is shown in HP titles and excerpts but not shown in post body (lato font shown), not shown in top menu or sidebar (times new roman shown)
please check the attached screenshots: first is from style.css editor dashboard (in appearance/editor) and second is of the style.css content downloaded from ftp (public_html/wp-content/themes/kleo.child)
As you can see the instruction is as you suggested but still the correct font is not visualized in parts of the website
