Multi-wavelength SED computed at Day 12.7 obtained using CXO data (blue data points: this paper) and the VLA radio observations (red data points: Ho et al. 2020c). We also included the ZTF g and r data points, computed for the same epoch from interpolation of the ZTF light curve. X-ray and radio data are clearly explained within the slow-cooling afterglow scenario (black line) (Sari et al. 1998; Granot et al. 2002), with a cooling-break frequency at ν_c = 6.3 × 10¹⁶ Hz. The dashed gray line shows the fit results using a single power-law segment with p = 2.08. The optical data are well above the afterglow model due to the presence of the bright SN 2020bvc.