Marginalised constraints on the cosmological parameters and linear bias from a joint 2PCF and 3PCF analysis. The posterior mean along with its uncertainties is displayed as a function of the minimal scale ($r_{\min }^{3\mathrm{PCF}}$) for different choices of η_min and fixing $r_{\min }^{2\mathrm{PCF}}=25h^{-1}\mathrm{Mpc}$ and r_max = 140 h⁻¹ Mpc for both statistics. The dashed black line refers to the fiducial values assumed in the simulation, while the dashed grey line refers to the fiducial b₁ adopted in Euclid Collaboration: Pezzotta et al. (2024), also shown in Fig. 3.