Ranked choice voting for Federal offices is unconstitutional. It dilutes the vote of committed single candidate voters and gives voters for fringe candidates more than one vote. This was pushed in Alaska by Murkowski supporters who simply wanted to disrupt the movement away from her towards Trump supporters like Palin. It is just another scheme to undermine one-man-one-vote and the 14th amendment equal protection under the law.
Certainly at the Presidential level, there isn't even a requirement that voters participate at all. It would be entirely constitutional for a state to decide that its presidential electors will be determined by the state legislature.