The man accused of committing one of Australia's worst mass shootings on a Jewish festival at Sydney's famed Bondi Beach last December has been charged with 19 additional offenses.

Naveed Akram was already facing 59 charges after the shooting at a Jewish festival at Bondi Beach last December.

Alleged gunman Naveed Akram, 24, was initially charged with 59 offences in the days following the shooting.