[4] Rob Hunter of Film School Rejects particularly praised So, stating that she "steals the show", with "her chemistry with the boys revealing a sincere sweetness and relatable energy";[16] while Edmund Lee of South China Morning Post also acknowledged So's casting, describing it as "adding a further sheen to the story".

[19] She starred as the female lead alongside Alex Fong in Patrick Kong's romance film Never Too Late [zh],[20] and took on a supporting role as Max Zhang's adoptive daughter in the crime thriller The Brink.

[27] In 2019, she joined an ensemble cast featuring Kent Cheng, Elaine Jin, and Babyjohn Choi as jury members in the crime film Guilt by Design [zh].

[28] Edmund Lee of South China Morning Post lamented the lack of screen-time for So and the rest of the ensemble cast, stating that their characters were only "there to serve functions of the plot, no more".

[30] In 2020, So landed a starring role alongside Wong You-nam in the horror comedy film Hell Bank Presents: Running Ghost [zh], portraying Chiu Ling-kay, a woman who can communicate with the dead.

[31] Alex Chung of HK01 praised So's performance as "lively and natural", highlighting her strong chemistry with co-star Wong You-nam;[32] while Tay Yek Keak of Today compared her character to Whoopi Goldberg's in Ghost.

[33] The following year, she had a main role in the ViuTV drama series Generation Slash [zh],[34] and later appeared as a bride holding her wedding in a quarantined hotel with her fiancé (played by Luk Wing) in All U Need Is Love.

[43] However, she terminated her contract with Warner Music prematurely in August 2024, with reports from Oriental Daily News and am730 indicating her dissatisfaction with the lack of job opportunities during her time as an artist with the label.