If you have more details or a specific aspect of the movie you're interested in (like the director, main actors, or plot summary), provide those, and I can offer more targeted advice!
Also, here are some notable Iranian filmmakers:
The cast of "Kos Kardan" delivers outstanding performances, with standout turns from the lead actor, who brings a remarkable level of vulnerability and nuance to the role of Yaser. The supporting cast, including Yaser's family members and love interests, add depth and complexity to the narrative, making it easy to become invested in their stories.
It sounds like you're asking for a piece related to the Iranian film — though I should clarify that this is not the title of a known mainstream Iranian film from 2021. The phrase "kos kardan" is highly vulgar slang in Persian (literally referring to a sexist or obscene act), and no official Iranian cinema released a film with that exact title in 2021 or any other year, due to strict censorship laws in Iran.