Cylindrically averaged power spectra of the ML-GPR component decomposition of the residual Stokes-I data for the three redshift bins. The top row shows the power spectra before ML-GPR. The second row shows the power spectra of the foreground components only (comprising the ‘sky’ and ‘mode-mixing’ components). The third row presents the power spectra of the residual data after subtracting the foregrounds using ML-GPR. The last row shows the ratio of the residual power to the thermal noise power. In all panels, the foreground horizon line is depicted by a dashed red line. The solid black line in the second row delimits the regions below which the foregrounds power is higher than the thermal noise power.