Dependence of the reionisation history (left panels), patchy (middle panels) and late-time (right panels) kSZ angular power spectra on the cosmological parameters the random forests were trained on (rows). For each parameter, three values are tested and we compare the spectrum obtained with the exact computation (dashed line) from the one inferred by the RF (solid line). The shaded area corresponds to the 68% confidence interval corresponding to the RF reconstruction errors (identical as Fig. A.1).