$v_{0}(p_\mathrm{T})$ of inclusive charged particles shown as a function of $p_\mathrm{T}$ for centrality intervals 10$-$20% (left), 30$-$40% (middle), and 60$-$70% (right) for varying pseudorapidity gap ($\Delta\eta$) and azimuthal acceptance ($\varphi$) in Pb$-$Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV. The statistical (systematic) uncertainties are represented by vertical bars (boxes). The bottom panel presents the ratio relative to the results for $\Delta\eta = 0.4$, $0 < \varphi < 2\pi$.