where is Western air power over Iraq?

a video showing the “battle” for Ramadi
https://www.youtube.com/watch?v=Gt43Le51pTw

they describe how they were surrounded by mobile units, and attacked with explosive-filled bulldozers
now I can’t help but wonder where the coalition air power was at this point
a single MQ-9 Reaper for example with a few Hellfires would have smashed this attack no trouble, pushing back ISIS and killing its forces at the same time