Facebook’s real-name policy and AI moderation systems are designed to detect names that obscure identity or violate community standards. When you use symbols that are not part of standard language character sets, two things happen:
ᴮᴼˢˢ, ɮɽʌŋɖəɖ Ӄʌʍəəŋʌ, Mʀ. Uŋstoppaʙʟe
If you want a stylish name without risking your main account name, use the Add a Nickname