The Fediverse did take off. Then large numbers of influential people got banned by randos and realized how much better and reliable (non-profit or not) corporate censors are.
Given the state of other social media. The randos were right to ban them probably.
That said, if you insisted that some "Germany's Independence Day" existed, then it's perhaps that what got you banned. Germany was never really a colony. Not of UK, not of Spain or Portugal, or not in newer times of Russia. Many countries that were a colony of them, or just annexxed, have an independence day. Germany doesn't --- the last time it was partially colonized, in roman times, there was no Germany.
Perhaps you mean the reunification day :-)