Top panel: GA Reconstruction of the coupling ζ as a function of redshift using the currently available α measurements and Euclid forecast constraints with a ζw₀w_aCDM fiducial. Bottom panel: reconstruction of the relative variation in the fine-structure constant Δα/α. The Webb data is shown in grey background points and the dedicated α measurements are shown in black background points. In both panels the red line corresponds to the GA reconstruction, while the shaded region is the 1σ error.