Full JWST/MIRI MRS extinction-corrected spectrum of XUE 10. The identified dust and gas phase polycyclic aromatic hydrocarbon (PAH) features are labeled and highlighted with a solid line. The insets zoom into various wavelength regions with the detection of carbon monoxide (¹²CO), four carbon dioxide isotopic species (¹²CO₂, ¹³CO₂, ¹⁶O¹²C¹⁸O, ¹⁶O¹²C¹⁷O), atomic hydrogen (HI Pf α line), and the tentative detection of water (H₂O).