Left: raw primary \RatioAntit ratio as a function of the momentum $\pvert$ in pp collisions at $\sqrt{s} = 13$ TeV. Right: ratio between the raw number of \AntiHThree candidates reconstructed in the TOF and the raw number of \AntiHThree reconstructed in the TPC in Pb--Pb collisions at \snn = 5.02 TeV as a function of the momentum $\pvert$. In both panels, data are shown in black, the statistical and systematic uncertainties are shown as vertical bars and boxes, respectively. The results from ALICE MC simulations based on \geantf are shown as coloured bands, the different colours referring to the different inelastic cross sections implemented in the simulations, with default $\sigma_{\rm inel}$ described in Ref.~. The width of the MC band represents the statistical uncertainty of the simulation.