Here is an interesting article about the COMEX/LBMA changes to good delivery lists for gold and silver.
Looks like a panic move to me.
I wonder if they included the Chinese bullion dealer that supplies gold plated tungsten?
https://goldseek.com/article/lbma-comex-collusion-intensifies-cme-approves-267-lbma-gold-and-silver-bar-brands
I am sure they are all approved as ethical suppliers - except Perth Mint.