Earlier, the insider Tom Henderson said that the full walkthrough of God of War: Ragnarök will take about 40 hours. The developers have not confirmed this information, but it is possible that Henderson's information is not accurate.
Journalists portal IGN received the press-copies of Ragnarök and reported that the game is clearly more extensive than the insider said. Jada Griffin in response to gamers' questions said that at the moment she has played a new part of God of War for more than 70 hours, and the content of the game is not over.
At the moment we can only guess which journalist is closer to the truth. You can personally start the walkthrough of God of War: Ragnarök and find out the real size of the game on November 9 on PlayStation 4 and PlayStation 5.