Weibo is bigger. Wechat too.
Weido and Wechat may have more users, but they aren't newsmakers. Just like there's more people at a Def Leppard concert than in the White House, but the White House makes news.
[0] https://www.npr.org/2021/06/04/1003284948/trump-suspended-fr...
https://news.ycombinator.com/item?id=31110766
Please learn how comment threads work.
Nobody cares about Facebook, even though it's hugely used it's a dead letter.