Man pages matching name unicode::maputf8 in section 3pm:

Unicode::MapUTF8.3pm.en	debian 10 / libunicode-maputf8-perl
Unicode::MapUTF8.3pm.en	debian 11 / libunicode-maputf8-perl
Unicode::MapUTF8.3pm.en	debian 12 / libunicode-maputf8-perl