Man pages matching name devel::dollarat in section 3pm:

Devel::DollarAt.3pm.en	debian 10 / libdevel-backtrace-perl
Devel::DollarAt.3pm.en	debian 11 / libdevel-backtrace-perl
Devel::DollarAt.3pm.en	debian 12 / libdevel-backtrace-perl