Smoothed soft X-ray 0.5–2.0 keV count map of the extended X-ray emission, obtained after subtracting the QSO’s PSF contribution. The filled black dot marks the QSO centre with a radius of 1″, while the transparent dot represents the inner 2″ region, where counts are used to rescale the PSF to the image. The magenta contours trace the Lyα nebula at surface brightness (SB) levels of 2.5, 4, 6, 8, 10, and 12 × 10⁻¹⁸ ergs⁻¹ cm⁻² arcsec⁻². The red cross marks the position of the QSO companion detected with ALMA.