Recovery test of the Uchuu SHAM catalog with α _sham = 1.0 and scatter = 0.15. The constraint uses w _p + ξ ₀ + ξ ₂ (right). The covariance matrix corresponds to the fiducial choice. Since the Uchuu simulation has larger volume than BOSS, we scale the uncertainties of the sample variance to match a 1 and 2h ⁻¹ Gpc box, respectively, and compare the constraints. Our result shows that this difference is diluted to some extent by the contribution from the emulator error; however, the sample variance corresponding to a larger box still gives a tighter constraint, consistent with expectation. The result shows that the input cosmology can be recovered within 1σ for all the cosmological parameters. This demonstrates the robustness of our assembly bias augmented HOD model and the construction of the emulator.