DM fractions within R_e as a function of the stellar mass surface density. The black diamonds show the DM fractions inferred by Puglisi et al. (2023) for z ∼ 1.5 SFGs, the black squares depict the z = 1 − 2 sample of Genzel et al. (2020), while the black triangles show the RC100 sample from Nestor Shachar et al. (2023). Our sample is colour-coded according to its redshifts. The circles depict the regular galaxies, while the stars represent the perturbed systems from our sample. The error bars represent the 95% confidence intervals. The red dotted line shows the toy model derived from the Tully–Fisher relation (see Bouché et al. 2022, Sect. 5.1).