Single-scale reduced 3PCF Q (upper plot of each panel) for the (s₁₂, s₁₃) configurations selected in Fig. B.1 and indicated at the top, as a function of the third side s₂₃. We show here the results for z = 0, with a different color for each of the considered neutrino masses, as shown in the legend. The lower plots show the corresponding detectabilities as a function of s₂₃ (Eq. 10), with the same color coding as Q. A blue dashed line marks the zero detectability level. The orange shaded area shows the region 90 h⁻¹ Mpc ≤ s₂₃ ≤ 110 h⁻¹ Mpc, corresponding to the expected location of the BAO peak.