Phase-folded light curves for TOI-663 d for the TESS photometry (seven transits) and ExTrA photometry (two transits, one with one telescope and the other with two telescopes). The black line is the maximum a posteriori model, the black points are data binned to one-sixth of the transit duration. The dark area to the left on the far right plot is due to the transit of the other exoplanets that happened close to the transit of TOI-663 d.