Mean cumulative flux distribution out of 1000 realizations of synthetic population containing 1600 sources emitting above two specific energies, i.e., > 100 GeV (left panel), and > 1 TeV (right panel). The flux has been normalized with respect to 1 Crab unit. The lighter colored areas represent the errors of each curve. In both plots, the mean distribution of sources across the realizations of the synthetic population within the CTAO (in blue) and H.E.S.S. (in red) footprints are directly compared with the firmly identified PWNe (in orange), the same added with PWNe in a composite SNR (in green), and the sum of these two with the known HGPS unidentified sources (in black).