Why does Calamity Ganon have Daruk's Protection?
Seeing that he doesnt have the other 3, it would seem that this is not Daruks protection.
It might be a similar ability, but its probably not the same thing.
Calamity Ganon is inheriting certain Abilities from the Blight Bosses
inside the Divine Beasts which all seem to share Abilities of the Champion counterparts in a similar fashion.
For example the shield he gets during his second phase seems near identical (with the exception of immunity to bombs which is changed to his own laser amongst ) with the ability that
Fireblight Ganon uses in his second Phase of the fight. which blocks off nearly any damage inflicked to him with only very little weaknesses to pass the shield.
Calamity Ganon has a few of the same abilities as the Fireblight Ganon and WaterBlight Ganon inside the Divine Beasts. To make this a fact is because Calamity Ganon uses the fire shield and uses a fire blade the same as FireBight Ganon, and he throws a huge spear like WaterBlight Ganon.