Wi-Fi 6 (802.11ax) is an evolution of previous Wi-Fi standards, designed to improve efficiency and capacity. The HCSP-Presales-Campus Network Planning and Design V1.0 documentation confirms:

Wi-Fi 6 operates on both the 2.4 GHz and 5 GHz frequency bands, maintaining compatibility with legacy devices while introducing enhancements like OFDMA and MU-MIMO.