Behaviour of A(Li) as a function of [Fe/H] for the stars on the RGB Li plateau, compared to predictions from models calculated with and without atomic diffusion (dashed and solid blue curves, respectively) according to MSB12, and with atomic diffusion plus an additional turbulent diffusion (green curve) as described in Deal et al. (2021). All models are calculated with an initial SBBN A(Li) = 2.74 dex.