Fediverse

Your own comment above basically supports the definition of tankie. Specifically, this:

The term is also used to describe people who endorse, defend, or deny the crimes committed by communist leaders such as Vladimir Lenin,[9][10] Joseph Stalin, Mao Zedong, Enver Hoxha, Pol Pot, and Kim il-Sung. In modern times, the term is used across the political spectrum to describe those who have a bias in favor of illiberal or authoritarian states with a socialist legacy or a nominally left-wing government, such as the Republic of Belarus, People's Republic of China, the Democratic People's Republic of Korea, the Republic of Nicaragua, the Russian Federation, the Republic of Serbia, the Syrian Arab Republic, and the Bolivarian Republic of Venezuela. Additionally, tankies have a tendency to support non-socialist states with no socialist legacy if they are opposed to the United States and the Western world in general, regardless of their ideology,[4][11] such as the Islamic Republic of Iran. (emphasis mine)

I would take issue with the single word 'fascist' that @figaro@lemdro.id is using, as the government doesn't need to be full-on fascist to it qualify for tankies to defend it. It only needs to be illiberal with a socialist legacy or nominally left-leaning government. So the definition is more broad than what figaro defines. But all the elements of Figaro's defintion are literally there in your own linked Wikipedia article.