Completeness of the VLT/FLAMES LR8 survey relative to the complete Gaia DR3 members (G < 19.7 and P_mem > 0.07) for the Sextans dSph as a function of Gaia DR3 G magnitude and Elliptical radius (r_ell), including the increased completeness from adding in Walker et al. (2023) υ_los measurements: (a) as a fraction of the total Gaia DR3 members (black), those with FLAMES confirming spectra (blue), and those with FLAMES plus Walker23 (green); (b) the total number of stars, with measurements from Gaia DR3 (black), Gaia DR3+FLAMES (blue), and Gaia DR3+FLAMES+Walker (green); (c) the completeness as a function of r_ell, for Gaia DR3+FLAMES (purple) and Gaia DR3+FLAMES+Walker (orange), with a dotted black line at 50% completeness.