So far the only specific files the Twitter Files have documented as having been requested for deletion by the Biden campaign are Hunters dick pics.
So yeah, this is the big one, the Biden campaign colluded with Twitter to deny the 1st amendment rights of a bunch of rightards to share and disseminate Hunters dick pics. Obviously this is very upsetting as every merkin has the right to look at Hunter's massive schlong.
Ignoring of course that the first amendment specifically protects the people from the government of the day making laws or acting in a manner that restricts the peoples right to freedom of speech, and that at that time, Trump was the the president, not Biden.