What speed do you seen with ap22 and wifi6 clients?
i have did iperf3 and speedtest.net tests and unable to push more than 450-500mbit, and the speed often jump up and down, if i switch to my UniFi U6-LR i get 650mbit without any problems. My old Meraki wifi5 is also better and more stable on speed.
I have tested power level up and down, did wifi scan and ap is running on low busy channel