Powerups for the Scare Invasion aren’t being applied to The Mayor.
It doesn’t really matter since he has 100% chance of success on all skills regardless of power levels (a level 1, white rank, 1 star Mayor can debuff\shatter a level 1000 Mama Bot with no chance of failure). However, he has “scare” skill so based on the “Scare Invasion” rules, he should get the same power ups as other “scare” skilled heroes.