Flux estimation for positronium radio recombination Ps87|$\alpha$| line for the optimistic case i.e. |$^{26}$|Al ejection all at once. Different coloured markers represent galaxies hosting the chosen sample of YMCs used for the estimation and visible using SKA telescope. The markers with bold outlines represent the |$^{26}$|Al yield in the stellar ejecta from Higgins et al. (2023), while the markers without bold outlines represent the yields from Martinet et al. (2022). The pink dashed line indicates the line sensitivity for SKA2 for the run of 100 h, and yellow dotted line for 1000 h.