The LHC forward (LHCf) is a unique experiment designed to measure neutral particle production spectra in the forward region to provide high-energy data for tuning the hadronic interaction models used by ground-based cosmic rays experiments. These measurements are possible thanks to the excellent performance of this experimental apparatus, composed of two sampling calorimeters, Arm1 and Arm2, located at about ±140 m from the LHC interaction point 1 (IP1) at zero-degree angle. In this work, we would like to present the data analysis strategy and preliminary results for the measurement of 𝜂 meson differential cross section as a function of the Feynman 𝑥𝐹 variable, measured in p-p collisions at √𝑠 = 13 TeV with the Arm2 detector and compared with the predictions of four widely used hadronic interaction models. The importance of this observation relies on the fact that the strange quark contribution is one of the parameters characterizing the different models. Thus differences in this parameter induce a large discrepancy in the expected 𝜂 production cross-section.