Maps for BDF-3299 from JWST NIRSpec IFU. The flux maps are obtained from the original data cube, while the line ratio and metallicity maps from the spatially smoothed data cube (details in Sect. 2.2). Median stellar continuum emission in the observed spectral range 1.1–2 μm (∼0.14–0.25 μm rest-frame; top-left). The rest is as in Fig. 2. The PRISM/CLEAR spectrum (bottom) is extracted from a circular aperture with radius of 0.1″ centred at the location of the most luminous component in continuum, BDF-3299-a.