Comparison of transmission spectroscopy metrics for all small transiting planets (R_p < 5 R_⊕) around young stars (age < 500 Myr) as a function of age in million years (Myr). Point size represents planetary radius, while point colour shows equilibrium temperature. Multi-planet systems with small planets are connected by red trails. The TOI-2076 system is labelled in red with TSM calculated using tentative masses derived from our TTVFaster/Ultranest models.