Panel a: similar to Fig. 10a, but with the pressure components plotted as a function of their oxygen abundance, 12 + log(O/H), with all markers coloured by their extinction and sized according to the HII region radii, where we take the median radii and extinction for the PHANGS data points (Barnes et al. 2021). Panel b: similar to panel a, but with only the 30 HII regions from the three dwarfs in this sample plotted against their cluster mass and coloured by their oxygen abundance.