Edit: follow-on question: are the other candidates there pulling more from Bolsonaro or Lula?
Edit2: Looks like both Ciro Gomes and Simone Tebet would draw votes form Lula based on the info on them from Wikipedia. They're drawing about 7% of the vote between the two of them so in a runoff between Bolosonaro and Lula so it seems like most of those votes would go to Lula. Still would be very close.