It’s hard to know, and a difficult call to make, but I don’t reckon much for the chances of it recovering.. Such a delicate plant, so recently planted,with no established roots, I think recovery from such a devastating blow in this early stage, is unlikely. I had the same thing happen with Monte Carlo and I never had success with it. I wondered the same as you when it happened, but I decided after a day or so to remove it. Replaced it with HC Cuba, which took very well, and I had success with. Ironically, Cuba is supposed to be a more difficult plant to grow 🤷🏻♂️.
Sorry to say, but I would hazard that it’s knackered. Someone else with experience of initial melt with this plant, and then successful, healthy growth afterwards might weigh in and correct me though, as I didn’t have the patience to persevere with it when mine melted.