Top left: evolution of the electron distribution in our model with EMBLEM at each observing time of the flare on 22 July 2018. The dotted black line corresponds to the injected κ electron distribution, which is composed of a thermal core with a power-law tail. The parameters are listed in Table 3. Bottom left: evolution of the electron distribution in the thermal model inspired by Ball et al. (2021) at each observing time of the flare on 22 July 2018. The parameters used for this distribution are the same as in our model (listed in Table 3), but with a dimensionless temperature of Θ_e = 109 and a magnetic field of B = 20 G. Right: full intrinsic light curves of the two models. We plot the light curve from the beginning of the growth phase in this panel, and in the left panels, we plot the distribution at the observed time of Fig. 8 (t_obs = t_intrinsic − 29.6 min).