Question Camera field smaller in playtest than preview

Hello everyone.
I'm facing an issue with my game camera. As you can see from the first and second pictures (scene view and game view), the white cat fits within the camera borders.



However, when I playtest the game, the camera narrows down a little bit, creating two black bars on the sides and covering part of the screen, thus leaving part of the white cat out of the screen. Is there a way to solve this?




Thanks in advance for your help!