Left: relation between the stellar mass and the enclosed dark matter mass within R_HI within the stellar mass range 10¹¹ M_⊙ ≤ M_* < 10^11.4 M_⊙. We show the ALFALFA sample in blue, the TNG100-true in orange, and in pink the combined literature late-type galaxies from Posti et al. (2019) and Di Teodoro et al. (2023). The orange solid and dashed lines indicates the median and the 1σ scatter (16th to 84th percentile) for TNG100-true. Right: normalized distributions of the enclosed dark matter mass within R_HI for the same samples, plotted in the same colour scheme.