By 2021, Dawn of the Planet of the Apes had been available for years on Blu-ray, DVD, and various streaming platforms like Google Play, Prime Video, and HBO Max. A search for a 2021 "dual audio 720p" version is, therefore, a search for a specific, unauthorized digital file.
The string "dual audio 720p 2021" is commonly used by piracy release groups to indicate an unauthorized rip (often with multiple audio tracks) uploaded years after the official release. dawn+of+the+planet+of+the+apes+2014+dual+audio+720p+2021