When I want to switch the frequency to 5GHz, I can’t do it. I have attached screenshots from the native settings application and from the Delta application.


After I turned off the WiFi, I was able to enter the frequency change menu, but I can’t change the frequency to 5 GHz. I attach a screenshot below.

I live in Russia, this frequency is not prohibited.
What could this be related to and how can it be solved?
It is worth noting that the phone itself connects to 5 GHz Wi-Fi without any problems.