Max was on higher fuel or low engine mode. He didn't gain much on the fastest parts of his soft lap vs his medium lap despite massive track evolution.
Ferrari looks fast, but I expect Max to be close.
Especially as every lap on mediums he was fastest overall with most purple minisectors of anyone until others continued to set fast laps and Max was already preparing for his high fuel run.
He often starts early with his race sim when he is happy with the balance.