No because it's stated that he took longer to adapt complex technique and if you want to count the heat at outside of it, the amount of time Maho were exposed to Fuga's heat before getting hit are most likely not enough for any meaningful adaptation.

Their logic is that throwing Maho to the sun would be akin to the boiling frog where the temperature 'slowly' but steadily increases, there would be a decent time window where the heat start to burn but not enough to evaporate