I know, but the thing with this airdrop is that most of them are un-announce or they are going to make it to the public in just a couple of days. So you should follow them on their official social media like Twitter as they usually put their announcement there.

But just be careful though, as scammers also had this kind of knowledge and so they will create a similar websites with celestia or any other projects that will airdrop soon and then asking you to connect your wallet. Do not do that as the criminals will scoop every tokens from you and drain everything.