Scatter plots of stellar luminosity versus accretion rate for all the synthetic observations, with symbols and colors referring to the detection rate after 2 min of exposure time with the F150W (left panel) and F277W (right panel) filters. The small black dots correspond to a non-detection of an accretion feature in all three directions (x, y, and z), the magenta triangles detection in only one direction, the green squares detection in two directions, and the large blue dots detection in all three directions. The protostars (class I or earlier) are highlighted by red circles around the markers. The red dotted vertical and horizontal lines mark the thresholds of Ṁ > 5 × 10⁻¹⁰ M_⊙/yr and L > 0.5 L_⊙, respectively.