Although private use area is technically a proper way to add a custom symbol to Unicode font/text, it's not the best way from accessibility perspective.
For users who can't see the font the character will be completely meaningless. Instead of getting e.g. "Compatible with Linux!" they'll get "Compatible with reserved symbol U+E001!"
For users who can't see the font the character will be completely meaningless. Instead of getting e.g. "Compatible with Linux!" they'll get "Compatible with reserved symbol U+E001!"