(Anti)deuteron $v_2$ measured in the centrality classes 0$-$20$\%$ (left) and 20$-$40$\%$ (right) in comparison with the coalescence predictions based on the mass-number scaling. Statistical and systematic uncertainties are shown as bars and boxes, respectively. The flow of deuterons is measured at midrapidity, i.e., $\left|y\right|< $ 0.5.