Galaxy redshift distributions estimated using Eq. (4) for four tomographic bins shown in blue lines estimated using (a) modified Lorentzian and (b) sum of Gaussians fit to the photometric redshift error distribution. The red line marks the CMB lensing kernel and the green line shows the total redshift distribution of DESI-LIS galaxies. The dashed vertical orange lines mark the boundaries for the four tomographic bins. The CMB lensing kernel and redshift distributions are normalised to the unit maximum for illustration.