\begin{document}$ e^+e^-\to\Lambda\bar\Lambda\eta $\end{document} from the perspective of near-threshold dynamics. Motivated by the possible existence of light \begin{document}$ \Lambda\bar\Lambda $\end{document} baryonium, we compare this interpretation with final-state interaction (FSI) explanations within a minimal FSI-dressed pole framework. Fits of pure-FSI, baryonium-like-pole, and mixed pole–continuum scenarios to the digitized BESIII spectrum indicate that the energy-dependent FSI description achieves the best balance between fit quality and model complexity. The extracted pole positions depend strongly on the amplitude parametrization, highlighting the sensitivity of the baryonium interpretation to the treatment of the continuum. We discuss how decay channels, spin observables, and searches for partner states can provide complementary constraints on the dynamics underlying the enhancement."> Discriminating baryonium and final-state-interaction interpretations of <i>X</i>(2356) -
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