I am currently creating a plugin that requires a specific font style not available on Figma. Is it possible for me to use the font styles without the user installing the fonts?
It’s not entirely clear where you want to use the custom font: in the plugin’s UI or in the TextNode in the file?
If in the plugin’s UI, then you can include any font available at the URL using the <link> tag in HTML or @import/@font-face in CSS.
If in a TextNode, then only available fonts can be applied to it, which you can get via figma.listAvailableFontsAsync().