Johnny Keeling

I'm new to this forum, therefore this is my first post. I couldn't find of a suitable place to start a thread, so I'm going to do it here. I recently encountered a serious issue while playing games. I have two monitors in order to increase my gaming experience. However, when I attempted to play 'Dying Light 2' last night, it opened on the second monitor. I do not understand what could be the reason. Could someone perhaps assist me in fixing the issue?