Bluesky aren't part of the #fediverse due to different protocols that they use, #ATProto aren't compatible with #ActivityPub and gladly we have Bridgy Fed to connect between them. But, only a few millions of Bluesky accounts are really connected to Bridgy Fed. Also, even though Bluesky does have more users than in fediverse, they somehow still do have limitations in their backend. 300 characters per post? Sounds like it's still limited. Also, most Bluesky users are coming from the U.S and then some countries like Brazil, Japan, and more. In Indonesia itself, Bluesky does have the same fate as the fediverse, being a minority. Well, centralisation still matters these days for anybody who doesn't give a damn about the social interactions.