Google Font isn't showing up in Upfront

I'm trying to use a Google Font on a website using Upfront. I've navigated to the Theme Fonts Manager where I'm supposed to be able to add any Google Font to my typography dropdown.

However, the font Poppins (which is a Google Font) is not showing up when I try to search for it and add it. This is specifically the font the client wants so choosing a different font is not an option.