Sky distribution of Tier-1 (green) and Tier-2 (red) clusters detected in the Planck ‘cosmological’ mask, outside the dusty galactic plane (green shaded area), and outside the region of low XMM-Newton visibility (red shaded area). A further cut in declination is applied for Tier-1. The synergy in sky coverage between our SZE selected sample and the UNIONS/CFIS/Euclid lensing surveys is clear. In total, 107 targets fall in the footprint of the Euclid Region of Interest survey (cyan) and 33 in the UNIONS/CFIS survey footprint (pink). Clusters with existing or ongoing deep WL mass measurements are marked by stars (see Sect. 4.1 for details).