One of the major unresolved issues in cosmic-ray physics is the transition from galactic to extra-galactic origin. Pinpointing the exact energy of this transition remains a challenge, as the trajectories of CRs are significantly influenced by the magnetic fields present in the Galaxy, making it difficult to trace individual CRs back to their specific origins. However, constraints can be obtained by studying the cosmic-ray anisotropy in the energy range from PeV to EeV where the transition is expected to occur. The sensitivity to cosmic-ray anisotropy is in particular a matter of statistics. With the upcoming IceCube-Gen2 surface array, which will cover 8 times more area than the existing IceTop surface array, there will be an increase in statistics and capability to investigate cosmic-ray anisotropy with higher sensitivity. We will present performed simulation studies of the sensitivity to the cosmic-ray anisotropy signal expected with the IceCube-Gen2 surface array.