My speculation:
Trump will eventually endorse DeSantis. DJT does not want to run again, but he wants to decide who the next president will be. He doesn’t want to commit prematurely, though, as DeSantis still has to be re-elected governor.
Can't imagine that Melania wants DJT to run again either. She and the entire Trump family have been put through sheer hell ever since they came down the escalator in Trump Tower.