This has been discussed a ton here with AX routers.
You need to add back the option to control individual device QoS Bandwidth control.You had or have it on other routers but not for the ones that cost $300. The QoS on this router is useless when using device priority. Setting any device on that list to on actually makes that device's network performance worse then when it's off. I've tested this a few times and noticed increased latency when it's on then when it's off. Please add back the individual QoS stuff again so we can make specific IP/MAC addresses use High, Medium, Low, etc settings.