Stellar-to-halo mass mass relation and star formation main sequence used in this work. Uppermost panel: Our (redshift independent) stellar to halo mass relation (solid curve) and 2σ scatter (shaded region). Lower panels: Galaxy star-forming main-sequence (solid curves) and 2σ scatter (shaded regions) at z = 5, 10, 15 (top to bottom). Coloured symbols represent galaxies from cosmological simulations, circles for FirstLight (Ceverino et al. 2018), stars for FLARES (Lovell et al. 2021), crosses for ASTRID (Bird et al. 2022; Davies et al. 2023) and triangles for SERRA (Pallottini et al. 2022). For ASTRID we randomly select galaxies in fixed mass bins, to avoid over crowding the plot, and for SERRA we use their z = 6 and z = 12 snapshots for z = 5 and 10, respectively.