Inferred magnitude of galaxy assembly bias in the low-z and high-z DESI ELG catalogues. We display the ratio of the correlation function in the best-fit SHAMe catalogue to a version where the position of haloes has been randomly shuffled among haloes of the same mass. Solid lines and shaded regions indicate the mean and 1σ region after marginalisation over all SHAMe parameters. We display the same quantity estimated in our mock DESI catalogues for comparison (DESI-TNG and DESI-SAM, dashed lines). At a fixed halo mass, DESI ELGs tend to be located preferentially in highly biased haloes, which is in qualitative agreement with the predictions of the TNG simulation.