Well when we say Bitcoin is decentralized that also means a centralized entity doesn't get to categorize what Bitcoin is and we shouldn't care how they categorize it either. Not to mention various centralized entities categorize Bitcoin in different ways, some have outright banned it as something illegal, some categorized it as a commodity, some as security and we all know of El Salvador that has categorized it as legal tender!
Centralized entities try to classify and categorize Bitcoin as centralized, while Bitcoin is truly decentralized. They are trying to do funny and ironic action, to prove that their centralized entities are good while they are truly not good.
Bitcoin is what it is, and it is decentralized. It does not need any entity, centralized or decentralized, to categorize it. Because any third party categorization on Bitcoin does not change what it is.
If people want to know what Bitcoin is, centralized or decentralized, they can read the Bitcoin white paper, check Bitcoin node map and they will see fact.
https://bitnodes.io/