Conspiracies are hidden. It's a confirmed fact that they banned his account during the election. This is no conspiracy - it's out in the open.
By this logic, old Twitter interfered with US elections by banning Trump.
Edit: the point about Trump was facetious, but old Twitter actually DID actively interfere in the 2020 election by censoring all sharing (even in DMs!) the New York Post Biden laptop story.
A conspiracy is just people talking to each other about a crime. It doesn’t have to be hidden. Conspiracies can be in the open.