Fri Jan 20 11:52:46 2023 daemon.notice netifd: Wireless device 'radio1' set retry=0
Fri Jan 20 11:52:46 2023 daemon.crit netifd: Wireless device 'radio1' setup failed, retry=0
Fri Jan 20 11:52:48 2023 daemon.notice netifd: radio1 (1889): WARNING: Variable 'data' does not exist or is not an array/object
Fri Jan 20 11:52:48 2023 daemon.notice netifd: radio1 (1889): Bug: PHY is undefined for device 'radio1'
Fri Jan 20 11:52:48 2023 daemon.notice netifd: Wireless device 'radio1' is now down
Why doesn't the country setting appear ?
Are the wlan cards being detected at boot ? (read log)
Why "generic" wlan and not the hardware ref (e.g. MediaTek MT7628AN) ?
Yes flashed. 5ghz working well. 2 days ago. I don't know when 5ghz stopped working. When i noticed i login to web and check the 5ghz is disabled. I trying to enable but no luck. Then i reset the router and again setup from zero. But issue present.
That is for EU version while you have US. There may be some tiny differences in hardware and wlan regulations.
The wlan 2.4 GHZ works because it is build-in the CPU. The 5GHz has separate chip, and you may not have the proper driver and/or settings.