The impact that formed the Yucatan crater may have done the job on its own, but it would surprise to find that it was one of a doublet impact, two or more chunks of the same parent body which had broken up prior to the terminal rendezvous.
Did you mean to say it would surprise or wouldn’t surprise you? It would not surprise me, given for example the Chesapeake Meteor 34 mya which was joined by the Popogai and Toms River craters at roughly the same time.