Man pages matching name data::parsebinary::filesystem::mbr in section 3pm:

Data::ParseBinary::FileSystem::MBR.3pm.en	debian 10 / libdata-parsebinary-perl
Data::ParseBinary::FileSystem::MBR.3pm.en	debian 11 / libdata-parsebinary-perl
Data::ParseBinary::FileSystem::MBR.3pm.en	debian 12 / libdata-parsebinary-perl