The increasing demand for high-data-rate wireless communications at millimeter-wave frequencies has highlighted the limitations of conventional propagation environments, where severe path loss and sensitivity to blockage degrade link reliability. In this context, the paradigm of Smart Radio Environments promotes the use of engineered electromagnetic surfaces to intentionally control wave propagation. Among the proposed implementations, reflective phase-gradient metasurfaces can operate as metaprisms, artificial structures that emulate the angular deflection mechanism of conventional optical prisms through engineered spatial phase distributions, enabling anomalous reflection and beam steering without mechanical reconfiguration. While theoretical models describe ideal continuous phase profiles, practical realizations rely on discretized unit cells constrained by geometry, dispersion, and bandwidth limitations, making the transition from theory to implementation a central challenge.