The Wi-Fi Alliance just announced the Wi-Fi 6 Release 2 standard. It brings improvements to uplink, as well as power management at all supported bands - 2.4GHz, 5GHz, and 6GHz - and is intended for routers and devices both at home and in the workplace as well as smart home IoT devices. Release 2 adds support for multi-user MIMO uplink - the ability for multiple connected devices to upload to an access point simultaneously. Wi-Fi 6 Release 2 is smarter with power management too. It supports new low-power and sleep modes that will particularly benefit battery-powered smart home...
Source: https://www.gsmarena.com/wifi_6_release_2_improves_upload_performance_andpower_management-news-52550.php