Abstract: We are now at the beginning of the era of utility-scale quantum computers, where we have quantum devices with a large number of qubits, allowing us to run circuits that are becoming more and more challenging to simulate classically. Many-Body Quantum Scars are special states violating the Eigenstate Thermalization Hypothesis (ETH), and thus provide useful benchmarks for quantum simulation algorithms running on quantum hardware. In particular, these models can be used to measure the strength of (or lack of) biases exhibited by different error mitigation methods. We report on our large-scale quantum simulations of Many-Body Quantum Scar States on IBM devices, where Qedma's error mitigation technique QESEM plays a crucial role in protecting the scar states against decay due to hardware noise. We also discuss quantum simulations of an integrable model, which is another example of ETH breaking. This demonstrates that today's hardware, combined with state-of-the-art error mitigation techniques, is becoming useful for exploring quantum many-body non-equilibrium phenomena.