[O III] velocity-channel maps (first-to-third panels) and spectroastrometry [O III] line positions (right panel). First to third panels: The velocity-channel maps were extracted from the ranges labelled in the individual panels. For each flux distribution, we report 3 and 5σ contour levels. The black cross identifies the GS133 nucleus, as inferred from spectroastrometry position of spectrally integrated [O III] profile (i.e. considering all velocity channels together); the white ellipse in the third panel represents the NIRSpec point spread function (PSF) at ∼2.2 μm (the [O III] observed wavelength) estimated by D’Eugenio et al. (2024); a scale bar and a compass are also reported in the first map. Right panel: Spectroastrometry of the [O III] emission, i.e. centroid positions of the line in the different velocity channels, covering a relatively small portion of the spatial extent shown in the velocity-channel maps (see white box in the third panel). The points are colour-coded by the channel velocity. The dot-dashed line roughly identifies the outflow axis, while the dotted line shows the tentative kinematic major axis of the GS133 rotating disc.