Distribution of log(Fe/N) vs 12+log(N/H). Upper panel: Milky Way stars from the sample described in Sect. 2. Lower panel: Galactic and extragalactic star-forming nebulae. The red dot highlights the position of J0811+4730 (Izotov et al. 2018), recently interpreted by Kojima et al. (2021) as enriched in Fe. The red star indicates the position of J1205+4551 (Izotov et al. 2017, 2021), a galaxy with elevated Fe/O abundances and evidence of WR activity. The red cross points out the location of the Sunburst Arc (Welch et al. 2024), a high-redshift (z = 2.37) galaxy recently observed by the JWST. Nebular N/H estimates consider the influence of nebular temperature variations (t² > 0). The solar Fe/N and N/H abundances from Asplund et al. (2021) are shown for reference. r is the Pearson correlation coefficient of the linear fit.