Understanding Available Fonts in Scriptable

** Let me preface this saying I have no coding background but I learn by seeing examples and trial and error. Also, I am new to the forum, but I did search and failed to find this addressed somewhere else.

I understand that to use fonts in scriptable, I should be referencing iosfonts.com for a list of available fonts. But (1) the site seems outdated or not updated and (2) the font I would like to use (SF Pro Display) is not listed. I know there are ways to download new fonts into iOS - would that be a way to use SF Pro Display in my scriptable widget. And if so, is it just guess and check to figure out how to reference it in my code?