Wong continued to impress on vault with a two-night score of 29.45, winning the national title on the apparatus ahead of Maile O'Keefe and Emma Malabuyo.

Wong also placed third on floor exercise as well as fifth in the all-around behind O'Keefe, Malabuyo, Eaker, and Adeline Kenlin with a combined total of 108.250 points.

[7] With O'Keefe, Malabuyo, Eaker, and Kenlin all moving to the senior level, Wong entered the season as one of the top American junior competitors.

In advance of this competition, she competed at the Auburn National Qualifier, where she won the all-around with upgraded routines on the uneven bars, balance beam, and floor exercise.

[8] Wong traveled to Buenos Aires, Argentina in June to make her international debut at the Junior Pan American Championships.

Two days later, Wong competed in the event finals on vault, uneven bars, and balance beam, placing second on each apparatus behind Tatum, Bowers, and Allaire-Bourgie, respectively.

With her victory at the Classic, she entered the meet as one of the contenders for the title along with fellow national team members Bowers, DiCello, Tatum, and Sunisa Lee.

Additionally, she won the national title on floor exercise, was the runner-up on vault behind DiCello and on uneven bars behind Lee, and placed sixth on balance beam.

[11] On March 2, Wong won the American Cup title with a score of 56.765, beating McCallum in second and the two previous World all-around silver medalists, Canada's Ellie Black (2017) and Japan's Mai Murakami (2018), who tied for third place.

[12] She debuted numerous upgrades, most notably a piked double Arabian (Dos Santos I) to immediate stag jump as her first tumbling pass on floor exercise.

[13] At the 2019 GK US Classic Leanne Wong finished fifth in the all-around behind Simone Biles, Riley McCusker,Grace McCallum, and Kara Eaker.

After the competition she was named to the team to compete at the Pan American Games alongside Finnegan, Hurd, McCusker, and Eaker.

[17][18] At the 2019 U.S. National Championships, Wong competed all four events on the first day of competition but ended the night in fifth place after she received a low score on floor exercise.

[19] On the second day of competition, she performed cleanly and placed fifth in the all-around behind Simone Biles, Sunisa Lee, Grace McCallum, and Morgan Hurd.

[21][22] In March Wong was selected to compete at the City of Jesolo Trophy alongside Kara Eaker, Shilese Jones, and Sophia Butler.

[27] In October Wong was selected to compete at the 2021 World Championships alongside Kayla DiCello, Konnor McClain, and eMjae Frazier.

[31] In October Wong was selected to compete at the 2022 World Championships alongside Skye Blakely, Jade Carey, Jordan Chiles, and Shilese Jones.

[34] Before the 2023 domestic elite season, Wong had already qualified to the 2023 U.S. National Gymnastics Championships by virtue of being a 2022 U.S. World team member.

As a result, she was selected to represent the United States at the 2023 World Championships alongside Biles, Skye Blakely, Jones, Joscelyn Roberson, and alternate Kayla DiCello.

After Roberson and Jessica Gadirova withdrew from the vault final, Wong competed (along with first and second reserves Ellie Black and Csenge Bácskay), placing seventh.

[37][38] Wong began the elite season competing at the Core Hydration Classic where she placed seventh in the all-around and won bronze on vault.

[41] Wong ended the year competing at the Swiss Cup where she was partnered with men's national team member Fuzzy Benas.

In the regional final on April 2, Wong upped her career-best all-around score to a 39.875 and earned her first perfect ten on vault.

In a dual meet against Missouri on February 10, Wong re-set her career high on floor with a 9.975, sharing the event title with teammates Sloane Blakely and Thomas.

In a dual meet against Oklahoma on March 3, Wong shared the floor exercise title with Faith Torrez of the Sooners with a 9.950 and won the all-around with a 39.675.