The attack on the Aleutians was indeed supposed to draw some American forces to that area. I don’t think they thought we would send one of our remaining two, as they thought fleet carriers to the Aleutians tho.
I also think they intended to occupy the Aleutians if they could, not just as a feint.
They did, Attu & Kiska - but the carrier assault on Unalaska was only a diversion.