She is a Senator for New South Wales representing the Liberal Party, succeeding Jim Molan after his death.

[4] She was a director of the Franchise Council of Australia from 2020 to 2023 and was active in various community groups in Western Sydney.

[2] Kovacic was the Liberal Party's candidate for the marginal Labor seat of Parramatta at the 2022 federal election, held by retiring MP Julie Owens.

The final two candidates, both from the party's Moderate faction, were Kovacic and Andrew Constance, a former New South Wales Cabinet minister who served as the member for Bega in the Legislative Assembly until his resignation in 2021.

[7][8] Kovacic was endorsed by Senator Andrew Bragg and deputy leader Sussan Ley, while Constance was endorsed by former Liberal Premier Gladys Berejiklian, Senator Marise Payne and her partner, former state Cabinet minister Stuart Ayres (who was the state member for Penrith until 2023).