perl -MExtUtils::Installed -le 'print join "\n", grep /lwp/i, ExtUtils::Installed->modules()'

LWP::ConsoleLogger
LWP::MediaTypes
LWP::Protocol::http::SocketUnixAlt
LWP::Protocol::https
Test::LWP::UserAgent

perl -MExtUtils::Installed -le 'print join "\n", grep /libwww/i, ExtUtils::Installed->modules()'

libwww::perl

perl -MExtUtils::Installed -le 'print join "\n", ExtUtils::Installed->files("libwww::perl")'

/perl-5.26.2/lib/site_perl/5.26.2/LWP.pm
43 more files...

perl -MModule::Metadata -MData::Dumper -le' print(Dumper(Module::Metadata->new_from_module("libwww::perl")))'

$VAR1 = undef;

perl -MModule::Metadata -MData::Dumper -le' print(Dumper(Module::Metadata->new_from_module("LWP")))'

$VAR1 = bless( {
                 'filename' => '/perl-5.26.2/lib/site_perl/5.26.2/LWP.pm',
                 'module' => 'LWP',

perl -MExtUtils::Installed -le 'print join "\n", ExtUtils::Installed->files("LWP")'

LWP is not installed at -e line 1.