Something difficult to achieve

Good morning to the entire CG team.
I am in need of your help.
I have 2 worlds created, and I want the equipment that I have in one world to be shared in the other. that is to say. Have a team on and when you reach the other world passing a portal, keep the same equipment.

I have already managed to maintain several things, but I have not been able to make the equipment persist.

You will need to keep track of what equipment they have by saving it to a shared key. You would look at the equipment saved in the shared key, and then spawn it for the player as they load in to each world.

In my message I explained well that I have not been able to link the equipment well. That link you sent me, I already used it but I can't make it work with the equipment. I am in need of some help.