GA reconstructions of the null tests mentioned in Sect. 3 using the Euclid-only BAO and Euclid + LSST SNe data for the ΛLTB mock. In all cases, the dashed line corresponds to the fiducial value of the corresponding test for the ΛLTB model, the red line is the GA fit, the blue line is the PA fit, the shaded regions correspond to the 68% uncertainties, and the black points correspond to the binned Euclid mock data.