Не очень понял. Символ в утф всегда одинаковый. Нет? Примеры есть?
There are several current definitions of UTF-8 in various standards documents:
RFC 3629 / STD 63 (2003), which establishes UTF-8 as a standard Internet protocol element
RFC 5198 defines UTF-8 NFC for Network Interchange (2008)
ISO/IEC 10646:2014 §9.1 (2014)[52]
The Unicode Standard, Version 11.0 (2018)[53]