Flux estimations for stacked positronium radio recombination lines ranging from Ps61|$\alpha$| to Ps208|$\alpha$| for 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). Additionally, the figure features the pink dashed line indicating the line sensitivity of SKA2 for a 100-h run, and a yellow dotted line for a 1000-h run.