You need to add custom CSS too.
fontfamily: ......
See below
To embed a font, copy the code into the <head> of your HTML
<link rel="preconnect" href="https://fonts.gstatic.com">
<link href="https://fonts.googleapis.com/css2?family=Poppins&display=swap" rel="stylesheet">
CSS rules to specify families
font-family: 'Poppins', sans-serif;
which is attached to body
, most of the time