Measured invariant-mass differential cross sections of the exclusive dimuon production $\gamma\gamma\to\mu\mu$ in \PbPb UPCs at \fivethreesixnn. The results are compared with predictions by Monte Carlo generators  described in the text. The top part of the figures: the absolute values of the cross sections are presented. The bottom part of the figures: the ratios of data to Monte Carlo-based predictions are presented. The bars represent the total statistical and systematic uncertainty added in quadrature.