Yes. In fact, this is one of the selling points of Ranked Choice Voting. It is often advantageous, with Ranked Choice Voting, for candidates to cooperate and campaign together (vote for me No.1 and my cooperating candidate No. 2. And negative campaigning is discouraged, because it often backfires, costing the attacking candidate 2nd and 3rd place votes. There are even examples of candidates producing joint videos, mailers, and other campaign literature encouraging voters to rank them either #1 or #2 on their ballots.