Histograms of the distribution of detection efficiency (ξ) of the QPE sources discovered by eROSITA. The sensitivity threshold required to significantly detect an eruption is drawn 10 000 times from a Gaussian distribution. Each iteration of ξ_i is then computed by downsampling the observed QPEs light curves through the real eRASS cadence and it represents the probability that our QPE search algorithm would trigger on the light curve of that given source.