Man pages matching name datetime::format::strptime in section 3pm:

DateTime::Format::Strptime.3pm.en	debian 10 / libdatetime-format-strptime-perl
DateTime::Format::Strptime.3pm.en	debian 11 / libdatetime-format-strptime-perl
DateTime::Format::Strptime.3pm.en	debian 12 / libdatetime-format-strptime-perl