Why some Windows system fonts ("System.fon", "Fixedsys.fon", "Terminal.fon" and nine more fonts) were lost in Photoshop since 2018? Will it be repaired?
Photoshop uses the system fonts library and all the fonts that show up in Photoshop are either system fonts or the one's from Typekit. Please refer this documentation Resolve missing fonts using Typekit | and let us know if that helps.
Unfortunately, this didn't help. Once again: only the extension fonts ".fon" disappeared. After the upgrade with variable fonts in October.