WSR-1166DHP2 support

I have WSR-1166DHP2 (and WSR-1166DHP). I believed these two models are exactly the same. Up to 19.07, the firmware name was wsr-1166, and this firmware works with both models. However, from 20.02, the firmware name is wsr-1166dhp. I installed this firmware to my WSR-1166DHP2. It works except the wireless support. 20.02 firmware supports only 5GHz band, 2.4 GHz band is not detected. This means from 20.02 and on, no (full) support for WSR-1166DHP2?

It seems I posted in the wrong group. I do not know how to remove this. I leave it and post the article in different group. Please delete this article > maintenance person.

I have wsr-1166dhp and wsr-1166dhp2. I thought these two models are exactly same. Up to 19.07 the Firmware name was wsr-1166 and both models worked perfect. But from 20.02 the name changed to wsr-1166dhp. It works perfect with wsr-1166dhp. But for wsr-1166dhp2, the Firmware does not support radio0 (11g). Except this problem, other functions works perfect. I checked /etc/config/wireless. It shows like this:

config wifi-device 'radio0'
option type 'mac80211'
option hwmode '11g'
option path '1e140000.pcie/pci0000:00/0000:00:01.0/0000:02:00.0'

config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11a'
option path '1e140000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'

Then I checked /sys/devices directory for wsr-1166dhp2:

root@OpenWrt:/sys/devices/platform/1e140000.pcie/pci0000:00# ls
0000:00:00.0 pci_bus uevent

Yes, the directory 0000:00:01.0 is missing. I checked the same place for wsr-1166dhp.
I found the folder for radio0. This seems the source of problem. May I know or ask developers to fix this?