Posterior predictive distribution (68% and 95% CIs as blue regions) of the deprojected P_m(k, z) in Fig. 1 relative to the black data points – θ ξ₋^(ij)(θ) in the lower left panels and θ ξ₊^(ij)(θ) in the upper right panels – for a combination (ij) of tomographic source bins, denoted as ‘z − ij’ inside the panels. The red lines represent the reference model, $P_{\mathrm{m}}^{\mathrm{DMO}}(k,z)$, employed in the regularised deprojection.