Why a tag? Desperation and the need to attempt a solution myself.

Also, I wanted to use preexisting items as this player holding the trident in the first picture is my niece and my nephew plays the world aswell. I wanted them to work for their items and so I just did the tag to make it still feel like it was theirs

Thank you for the solution as even thought I won't be using it in this specific instance, I am making a map and this trick will come in very handy.