Man pages matching name perlio::utf8_strict in section 3pm:

PerlIO::utf8_strict.3pm.en	debian 10 / libperlio-utf8-strict-perl
PerlIO::utf8_strict.3pm.en	debian 11 / libperlio-utf8-strict-perl
PerlIO::utf8_strict.3pm.en	debian 12 / libperlio-utf8-strict-perl