From wikipedia
Doxing or doxxing is the act of publicly providing personally identifiable information about an individual or organization, usually via the Internet and without their consent.
Also, on the off chance you are someone who thinks wikipedia is biased:
Doxing, also spelled doxxing, is the act of publicly disclosing personally identifiable information about an individual or organization without consent, typically via the internet, with the intent to harass, intimidate, expose, or otherwise harm the target.
Country is not PII unless it is combined w/ other personally identifiable information. Second, the intent is not present because most of the exposed account have similar political leanings as Elon Musk