Simultaneous fit of the invariant-mass distribution (top panel) and the elliptic-flow coefficient, $V_{2\Delta}^{\phi\text{-}h}$ (bottom panel), as a function of the invariant mass of oppositely-charged kaon pairs in the transverse-momentum interval $1.6 \pt 2$~GeV/$c$ in OO collisions at \snn = 5.36~TeV for the 10--40\% \ntrk class. The total fit function is shown as a solid blue line, while the combinatorial background contribution to the invariant-mass distribution is indicated by the red dashed line.