[1] The ship, based on the Álvaro de Bazán-class frigate designed by Navantia, was built at ASC's shipyard in Osborne, South Australia, from modules fabricated by ASC, BAE Systems Australia in Victoria, and Forgacs Group in New South Wales.

[7] On 8 May 2021 Sydney struck and killed two endangered fin whales which were discovered after the ship docked at the U.S. Navy base in San Diego, California.

[8] The Center for Biological Diversity announced its intent to sue the U.S. Navy and the National Marine Fisheries Service for what it called "violations" of the Endangered Species Act.

[10] On 19 July, Sydney participated in the sinking of the decommissioned amphibious assault ship USS Tarawa off the coast of Hawaii by firing a Naval Strike Missile.

[11] On 12 September, Sydney was deployed in Operation Argos in monitoring illegal shipment of goods in and out of North Korea.