It is 100% intentional and orchestrated by the US government and Meta being their enforcer.
They've banned Bolsonaro's competitor days before the election. The US government has PUBLICLY announced that they would interfere with the brazilian elections.
That's without mentioning all the manipulation Flavio has done with AI and bots, which we can't yet prove was aided by the US (I'm personally sure it was, but I don't have any evidence to back it up)