Man pages matching name datetime::format::builder::tutorial in section 3pm:

DateTime::Format::Builder::Tutorial.3pm.en	debian 10 / libdatetime-format-builder-perl
DateTime::Format::Builder::Tutorial.3pm.en	debian 11 / libdatetime-format-builder-perl
DateTime::Format::Builder::Tutorial.3pm.en	debian 12 / libdatetime-format-builder-perl