Phase-folded LCs showing the transits of TOI-776b (first column) and TOI-776c (second column). Top panels: detrended CHEOPS LCs; the best-fit transit models are shown as red lines together with their corresponding residuals. Bottom panels: same as top, but for the TESS LCs. Data are shown in the nominal cadence modes (blue dots) and also binned to 10 min (black markers) with their associated error bars. We note that the transit durations and depths as measured by TESS and CHEOPS are identical within uncertainties. The transit depths found by CHEOPS are 909 ppm for planet b and 1177 ppm for planet c.