$\mathrm{M}{(H_2)}^{[CI]}$ vs. $\mathrm{M}{(H_2)}^{\mathit{CO}}$ plot. The best fit using the lmfit package (red dashed line) and the linmix package (thick black solid line) are presented in the figure. The 1-to-1 line is presented as a dashed black line. Finally, the relation derived in Montoya Arroyave et al. (2023) ($log\mathrm{M}{({\mathrm{H}}_2)}^{[\mathrm{CI}]}=(1.21\pm 2.42)+(0.91\pm 0.25)log\mathrm{M}{({\mathrm{H}}_2)}^{\mathrm{CO}}$) is included as a dotted magenta line.