In the QoS Rule List, pressing the Bin to delete a rule tries to move the rule to another priority, intead of deleting it. Any suggestion please to successfully delete QoS rules?

Please please make a tutorial on how to enable QOS in this modem or give and update to easily enable QOS for any user , the tutorial which is in site is really really really complicated. I saw that it

HELLO, when i am using 2.4ghz band my xiaomi phone built in wifi section shows my connection speed is 286Mbps , while it should show 574 Mbps at 2.4 GHz ....i dont have this problem in 5GHZ band and i