Are fonts we download and add to our projects legally eligible for web embedding?
You should check the font’s terms and conditions page if you can add the fonts into the download - most of them comes with GPL but some of them such as Adobe fonts, you cannot.
But instead of using the custom font, it’s suggested to use “Google fonts” for several reasons.
I wasn’t able to locate anything about web embedding in the conditions. Using google fonts or other open source fonts defeats the purpose of using fonts here. The font in question is called western-grit https://elements.envato.com/western-grit-FSY5JP