The social credit score doesn't exist in China. There were attempts in some cities with very restricted scopes but they were phased out.

On the other hand, in Europe and with the coming chat control regulations, these systems will likely emerge in the West.

Perhaps you can explain something then, since you appear to be knowledgeable on this matter. On this[1] eBay item from a seller based in China, under their "Seller business information", they list

  UNIFIED_SOCIAL_CREDIT_CODE: 91440300MA5ED70C7X
.. what is that exactly, if social credit score does not exist?

[1] https://www.ebay.co.uk/itm/305629164114

That's a social credit score for businesses, not individuals.