How to kill the player and make the camera stop following if he falls

I’m making a game that is similar to doodle jump, I’m having a problem on figuring out how to make the player die if he falls beneath the platform he last was on as the camera stops following him? Any tips or suggestions will be greatly appreciated, thank you for taking your time to read this post!

Create a trigger zone beneath the platform that when the player touches it, it sends a message to your Camera to nullify it’s follow target.

I haven’t done this but I would start by making sure the camera isn’t parented to the player. I’d have it follow the player as the player moves up but allow a buffer zone when the player is falling that is equal to the screen area. If the player falls below that point & the character is offscreen kill the character & respawn the player somewhere. Shift the camera position to view the player again.
Alternatively, if the respawn is just on the lowest visible platform you could try only having the camera move up & never move down.

you should Identify if Player Exist if no then Stop following The Camera Using the code

GameObject Player=GameObject.FindGameObjectWithTag("PLayer");
        if(Player){
            transform.position=Player.transform.position;
        }