[CII] PS at z = 5.8 for our AM and rTNG models combined with the SFR-to-L_[CII] relation of V15. Results are the same as in Fig. 7 but this time is plotted with the uncertainties coming from the S/N of Fig. 9 for Δk = 0.034 Mpc⁻¹. The plot serves as an example of the potential of FYST to trace the [CII] PS from the EoR on large scales constraining the halo-to-galaxy SFR relation.