new version Archer C6(EU)_V2_200630 it is still not possible to control and connect per device. I wonder what Qos is for. If I have 1 GB, I would like to distribute them to devices and not to all.

this option should be available because what is global QoS for. It can't be assigned to the MAC address of the device and I have tplink ver firmware 1.3.0 build 20200402 rel 520000 (4555)