0.88 mm flux density scaled to 140 pc as a function of host mass (star, brown dwarf, or planetary-mass companion). Blue circles and teal triangles show detections and 3σ upper limits, respectively. Class II disk measurements in Taurus, Lupus, and Chamaeleon I and PMC limits are compiled from Y.-L. Wu et al. (2020), with additional measurements for 2M1207 b (L. Ricci et al. 2017), WISPIT 2b (S. Facchini et al. 2026), PDS 70 b,c (M. Benisty et al. 2021), and SR 12 c (Y.-L. Wu et al. 2022). The black dashed line shows our Bayesian fit to the Class II sample, including upper limits. Following Y.-L. Wu et al. (2020), dark and light gray bands mark the 95% credible interval for the mean relation and the 95% predictive interval including 0.75 dex intrinsic scatter, respectively. The orange bar shows our 3σ limit for candidate CPDs in AB Aur over an adopted companion mass range of 1–15 M_Jup.