Integrated emission maps of selected emission lines of ionized species. Integrated emission maps are created from the cubes after subtracting the local continuum. Positions of the protostars measured from the line-free region at 5 μm are shown with white stars. Maps are centered on the position of the TMC1-W source. Bottom-left corners: MIRI-MRS empirical FWHM of PSF (Law et al. 2023) indicated as a white circle.