Is it possible to unlock a iCloud locked iPhone?

Hello, the day before yesterday I exchanged a car. As an additional payment, I was given an iPhone 12. Its iCloud was blocked. The owner said that he bought it with his own hands and it was blocked when updating. I want to find out if it's possible to unblock it somehow, but I don't have any connections with the owner of iCloud.

[Edited by Moderator]