In the same year, he joined the survival program The Unit, in which he finished in ninth place and became a member of the project group UNB.

[2] In the same year, he participated in the survival show The Unit: Idol Rebooting Project alongside fellow A.C.E member Jun.

[6] In March 2020, Kang joined the main cast of the web series Twenty-Twenty where he played Son Bo-hyun.

[7][8][9] In 2022, Kang portrayed the role of Bang Yu-chan in Playlist's web drama series Mimicus.

[12] In August 2024, it was announced that Kang had a main role in the drama Timetable as Hong Yeon, a restaurant owner who helps the dead move on to the next life without regrets.