You yourself claim that you are only aware of Xcheck "features" since 2021,

   As of June 2021 no XCheck tag I knew of allowed a user to take down content at will.

Are you also claiming that there have been no changes, and no new features, added to XCheck since June 2021? Are you aware of the new social media regulations recently passed by the current Modi government of India? (To be credible, you need to honestly answer these questions and address it in your article too, as otherwise you are basing your assumptions on incomplete information, thereby misleading yourself and others.)

To clarify, one of the requirement of this regulation is:

   Under the new Intermediaries Rules, intermediaries must *complete* the takedown process under Section 79(3) of the IT Act, within 36 hours. 

Source: https://internetfreedom.in/intermediaries-rules-2021/ (a more brief summary of the regulation is here - https://techwireasia.com/2021/06/indias-new-social-media-rul...)

Very simply put, large social media platforms are legally required to respond and delete content when requested by government representatives.

Under such a scenario, can you confidently say that XCheck hasn't been extended with new features, like a tag that allows a user to immediately flag posts that must be compulsorily taken down when the particular user reports it? It seems a very obvious extension when you consider the political demands that are placed on Meta from around the world, and in India in particular.