$D(z_{\rm T})$ distributions for isolated-prompt photon-hadron correlations measured in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ $\mathrm{TeV}$ for three centrality classes: 0$-$30% (left), 30$-$50% (middle), and 50$-$90% (right). The boxes and vertical lines represent the systematic and statistical uncertainties, respectively. Different theory predictions are shown: an NLO pQCD calculation including energy loss [75,76] (pink line and uncertainty band), and from CoLBT-hydro [83] (cyan-dashed line and uncertainty band). Also, an NLO pQCD prediction for pp collisions at $\sqrt{s_{\rm NN}}=5.02$ $\mathrm{TeV}$ is shown (green line and uncertainty band).