Expected gamma-ray flux at 100 TeV from the LHAASO-KM2A source sample, as computed by extrapolating the spectral fits provided in Cao et al. (2024a). UHE sources as identified in LHAASO-KM2A catalogue (TS₁₀₀ > 20) are shown in solid markers, while empty markers represent the remaining sample; visible sources by any IACT are labelled with their name identifier in the plot. The marker colour indicates if a sources culminates above the zenith angle Z_min (indicated in each panel) in the northern (blue) or in the southern (red) hemisphere. Overlaid are shown the differential sensitivities of ASTRI and CTA, where the bans span different exposure times from 50 to 300 hours. Left: The differential sensitivity is calculated with minimum zenith angle of sources equal to 20°. Right: Sensitivities are calculated for minimum zenith angle of 60°; ASTRI is not included in this panel as its IRFs in such conditions are not yet available for this study.