3d fighting game

I started ue5 2 weeks ago and wanted to make tekken 8 like game were 2 players fight and can moe freely in 3d not in 2d constraint . I managed to find a tutorial that allowed me to make the camera on the side and let the 2 characters always face each other.
but I cant find any tutorial on how to center the camera between the 2 characters and always be between them. if players move away it will zoom out between them and lastly if they go far to a specific distance they just cant go further as a limit.
I still dont know how to use child character I just added it there . still cant understand how to use actor as a camera instead of the character class. but I added a screenshot of my poor skills trying to achieve that