Viewing angle as a function of redshift of theoretical KN following BNS mergers (white points) detected by ET alone (top panel) and ET in a network with CE (bottom panel). Colored points represent WST detections, different colors corresponding to different S/N. The lack in GW detections for edge-on systems is due to GW signal S/N, that is higher for face-on systems with respect to edge-on systems with the same intrinsic parameters.