I guess you are using a supercell built with NxN MoS2 primitive cells to match the two structures. If so, you have to figure out where the K-point is folded to in the BZ of this supercell. The easiest way of doing it is to calculate the band structure of the pristine MoS2 layer modeled for the NxN MoS2 supercell, i.e., without the Co2FeAl (001) surface.