Export to PDF fonts

I am trying to get a good export to pdf from my page design.
I limited myself to Google fonts, as I thought they would most easiy convert to pdf but it does not seem to be the case.

I tried Poppins for example, as text and in bold for Titles and in italics for other things, but the bold and italics do not convert at all, and even the text doesnt look pretty.

Is there a trick to choosing the font for pdf export and or maximizing your chances of a decent conversion?
Many thanks