There are conspiracy theories about Biden's signature on his memo dropping out of the campaign. There are also conspiracy theories about how Biden hasn't been seen since the memo dropping out of the campaign.
Biden has COVID. It would be highly irresponsible of him to appear in public until he is cleared to do so. Unlike your beloved leader who held parties during the height that of the pandemic, infecting many people, and came to his 2020 debate with Biden too late to undergo the mandatory COVID test—when he knew he had COVID—Biden actually cares about other people.
Correction, Biden claimed that he had COVID. As for irresponsible, he has been shown not wearing mask after COVID announcement. COVID cannot prevent POTUS from appearing on camera, yet he choose to use TwitterX,
My conspiracy theory is that AI model they currently have was not trained on Parkinson version of Biden, so they choose to use AI audio, which, by they way, is not using Parkinson version of Biden either.