Visualization of the multiwavelength data explored in this work. Left panel: FORS2/R-band image with overlaid the footprint of the MUSE (purple), FORS2 and HAWK-I (orange), HST/ACS F625W (blue), HST/ACS F814W (light-blue), JWST/NIRCam (red) and ALMA/Band3 and Band6 (green) observations. Right panel: the zoom-in shows the MUSE White-Light image in the background with highlighted the MQN01 high-confidence sample of galaxies found in the MUSE FoV within a line-of-sight separation |Δv|≤1000 km s⁻¹ around the QSO (blue squares), the cross-matched CO(4–3) line-emitters found by ALMA (green diamonds, see Pensabene et al. 2024) and X-Ray sources detected by Chandra (red circles, see Travascio et al. 2025). The target QSO is marked by a gold star.