  Precision measurements of electron reconstruction, identification, and
isolation efficiencies and photon identification efficiencies are presented.
They use the full Run 2 data of $pp$ collisions at a centre-of-mass energy of
13 TeV, corresponding to an integrated luminosity of 139 $\mathrm{fb}^{-1}$
collected by the ATLAS experiment during the years 2015-2018. The measured
electron identification efficiencies have uncertainties that are around 30%-50%
smaller than the previous Run 2 results due to an improved methodology and the
inclusion of more data. A better pile-up subtraction method leads to electron
isolation efficiencies that are more independent of the amount of pile-up
activity. Updated photon identification efficiencies are also presented, using
the full Run 2 data. When compared to the previous measurement, a 30%-40%
smaller uncertainty is observed on the photon identification efficiencies,
thanks to the increased amount of available data.
