Hey Kimberly,
Sorry for the confusion. The Font Display option isn’t for speed. What it does is alleviate the “Flash Of Unstyled Text” issue in web development, not just our theme.
Regarding the Font Awesome speed, it will only be as fast as your web host as it’s self-hosted. We understand that the PageSpeed Insights report it as a blocking resource since it’s loaded in the header like any other font but loading the font in the header is the standard way in web development. It sure is slow but that is for stability since the method to load fonts in the footer (which will pass PageSpeed Insights) is experimental and it’s beyond the scope of our support to give you that.
There are performance plugins that can transfer all the fonts to be loaded in the footer. Please check some plugins like LiteSpeed. Just still note that we cannot provide further info on this as this is beyond the functionality of our theme.
Hope that helps and thank you for understanding.