There were federal personnel among the rioters, but they weren't, to any evidence, either FBI or provocateurs (there were both active-duty military intelligence personnel and at least one DEI agent arrested and charged.)

"FBI provocateurs" seems to be one of the mutually contradictory stories adopted by the MAGA cult (alongside "it was a violent riot -- but by Antifa", "and it was MAGA, but it was peaceful, no different than tourism".)