It looks like Knack 2 isn’t very popular in Japan and it is nowhere close to its predecessor. The game flopped hard in Japan where it was sold in 2601 copies in the first week.
For comparison, Knack 2 sold 322,083 in its first week via Famitsu. It is important to note that the game was sold in a PS4 bundle and that boosted the sales by a lot. The sequel didn’t get accepted well outside of Japan as well but no one expected that Knack 2 would sell only 2601 units.
The low sale numbers should indicate that this will be the last we will see from Knack. Sony may prove me wrong but I feel that it’s time to let it go and move on.