¹²CO spectra extracted at the location of WISPIT 2b from the 51 × 38 mas mirrored cube for circular apertures with radii between 0.67 and 1.5 R_Hill. The spectra are shown relative to the systemic velocity of the planet (v_b = 6.5 km s⁻¹ in the LSRK reference), with the shaded regions indicating the 1σ uncertainty estimated from line-free regions of the cube and scaled by the square root of the number of synthesized beams enclosed by each aperture.