Normalised azimuthal brightness profiles of the deprojected ring at four wavelengths, 0.45, 0.89, 1.25, and 2.20 mm (ALMA bands 9, 7, 6, and 4), as a function of position angle (PA). PA increases east of north, in the direction of the system’s orbital motion. Left: model with M_gas= 50 M_⊕. Right: model with M_gas=5 M_⊕. Profiles are normalised to the azimuthally smooth ring component (unity corresponds to the smooth-ring level). Insets show the offset of the peak PA at each wavelength relative to the band 7 peak measured in Marino et al. (2026b). In the highmass model, the peak PA is nearly wavelengthindependent and the contrast increases with wavelength; in the low-mass model, the contrast drops at 2.2 mm and the peak shifts systematically toward larger PA with increasing wavelength.