If that were the case, the source of this information would somehow be related to Biden or his government. But that's not the source.
The source is so-called whistleblowers who are being resisted, threatened, and stigmatized by the Deep State/government/Pentagon.
Sometimes whistleblowers are actually authorized leakers and the threats of the higher-ups are just for show. Nowadays, one can’t be sure.
But point taken. Maybe the US and the Chinese (and the Russians and Musk and Bezos) have technologies that they haven’t revealed yet. There’s a very slim chance that an alien civilization has sent spacecraft here, and an even slimmer one that they’ve come in person, rather than just sent uncrewed probes.