I've been struggling to find a way to solve this problem. I started a new project but for some reason, the only font that is shown is Roboto Regular. It doesn't even show me an arrow to reveal the list of other fonts ( the basic ones). I can type in fonts but I really want to browse through all the fonts on the list as I've done in my previous work. I haven't had this problem with any of my past projects.
Which version of XD are you using? From the screenshot, it looks like you are on a PC. Which OS?