Nature Communications, Published online: 17 June 2026; doi:10.1038/s41467-026-74302-7 Ergodicity (or lack thereof) plays a major role in the relaxation of quantum systems to equilibrium, yet the search of experimentally accessible quantities acting as its signatures is still ongoing. Here, the authors observe the sought-after features of the coherent forward scattering peak from a Bose-Einstein condensate within an optical lattice.