$I_{\rm pQCD}$ for central Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ $\mathrm{TeV}$ measured in ALICE for isolated-prompt $\gamma-$hadron correlations, and $I_{\rm AA}$ measured in CMS for isolated-prompt $\gamma-$jet correlations [49] and Z$^{0}-$hadron correlations [52] also in central collisions. The boxes and vertical lines represent the systematic and statistical uncertainties, respectively. For ALICE, the blue-open boxes represent the $\mu$ scale uncertainty for the denominator NLO pQCD calculation for pp collisions.