BH mass acquired through Roche-lobe accretion from a He-rich star, plotted against the star’s mass and the orbital period. Black and colored symbols represent the initial and final values for the He-rich star mass and orbital period. The color gradient along the lines indicates the evolving mass of the BH as a function of the He-rich star mass and orbital period. Symbols denote different scenarios: circles for BHNS systems, stars for dynamical delayed instability (DDI), and crosses for initial overflow cases. The two panels correspond to different accretion rates: 1.0 Ṁ_Edd in the left panel and 10.0 Ṁ_Edd in the right panel. The plus symbol refers to the systems that might be representative of the progenitors of GW230529.