Yes, a diplomat can not only register an entire shipping container under diplomatic cover but multiple shipping containers on the same ship.
Under what administration did this insanity start, I wonder.
Here’s a good short vid on K-club containers and what can be in them:
Day 41.2 Russian Group K Container Missile System - Gulftainer Partner - UAE has 35 yr lease on Port Canaveral
UAE has ties to Sadam Nuke Bomb maker and Russia:
https://www.youtube.com/watch?v=ymVyK46VPRg
Do a web search for Project Pelican for more info