In 2018 Sporshia shifted her focus to films and OTT productions. Her first feature, Abar Boshonto (2019), earned the Meril Prothom Alo Award and the CJFB Award for Best Debutant. The same year she appeared in Sincerely Yours, Dhaka, Bangladesh's first anthology film, which premiered at the Busan International Film Festival.
In 2020 Kathbirali became both a critical and commercial success, and in 2021 her portrayal of a rape survivor in Nabab LLB received significant critical praise. On OTT she starred in No Couple Entry, Paanch Phoron, Bou Diaries, Nikhoj, Makal, Isaac Liton, Asharer Golpo and Bodh — Best Web Series at the Swedish International Film Festival 2022. She also served as Executive Producer on the government-grant film Dawal and was co-founder and creative producer at Creative Company.