How can I Control Pawn's rotation from another actor's camera?

I Have a Character with FPP camera and it works(I can rotate up/down left and right),
But when I switch to my weapon(with its camera) to aim down sight, I am not able to control the pitch(but move left and right I can), so I can aim wherever I want?

How can I allow this camera to control the pawn`s rotation?

The screenshots are attached down below.

Please help me out! I will greatly appreciate your help!
Many thanks, for your help!:slight_smile: