i have the exact same problem: with win11 the fonts are not syncing with figma. after every reboot of the pc i have to reinstall all my fonts i’m using in figma. then they are recognized again. this happens in the browser AND on the app.
i tried to delete all of the fonts, reinstalling the figma font service, trying without the font service just in the app… the problem persists. the font itself is not the problem because on windows10 and on mac i can use it without a problem.