I just recently bought S21 FE, and installed all the recent update. Then made a factory reset just to confirm that 5GHz Band Wifi is not showing up. I saw in a thread where someone said that Booting the phone inside Recovery mode the 5Ghz works, but after the phone gets Disconnected From That wifi it no longer shows up inside available wifi network list. I followed that, and seems like its true. But that's very annoying. Dont propose any solution with factory reset, because I have already done it 2-3 times.
