On 2 December 2022, Leong was appointed as Pahang EXCO Member by Menteri Besar Wan Rosdy.
She won the seat and was elected to the Pahang State Legislative Assembly as the Triang MLA for the first term, taking over her father after defeating Tan Tin Loon of BN by a majority of 5,009 votes.
[citation needed] In the 2018 Pahang state election, Leong was renominated by PH to defend the Triang seat.
She defended the seat and was reelected to the Pahang Assembly as the Triang MLA for the second term after defeating Tan of BN in a rematch by a majority of 6,454 votes.
Leong defended the seat after defeating Yee Cheng Hwa of BN and Izzuddin Zulkifli of Perikatan Nasional (PN) by a majority of 6,219 votes.