Man pages matching name plack::builder::conditionals in section 3pm:

Plack::Builder::Conditionals.3pm.en	debian 10 / libplack-builder-conditionals-perl
Plack::Builder::Conditionals.3pm.en	debian 11 / libplack-builder-conditionals-perl
Plack::Builder::Conditionals.3pm.en	debian 12 / libplack-builder-conditionals-perl