Man pages matching name math::int64::native_if_available in section 3pm:

Math::Int64::native_if_available.3pm.en	debian 10 / libmath-int64-perl
Math::Int64::native_if_available.3pm.en	debian 11 / libmath-int64-perl
Math::Int64::native_if_available.3pm.en	debian 12 / libmath-int64-perl