We investigate the quantum Mpemba effect (QME) in isolated, nonintegrable quantum systems, where relaxation dynamics depend on structure of the initial states. By analyzing the distribution of initial states across symmetrical subspaces, we identify a tunable mechanism that influences the emergence of QME, showing faster relaxation from certain out-of-equilibrium states. Additionally, we propose an experimentally realizable quantum circuit, which requires no complex controls on quantum simulator platforms and serves to verify our theoretical predictions. These results establish symmetry-resolved state engineering as a practical tool for manipulating nonequilibrium quantum dynamics.

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• Entanglement entropy
• Quantum quench
• Quantum many-body systems
• Spin chains