Well I have a strange issue here with my rpi 4 4Gb
Tested both with case and without case (barebone)
When I first start my RPI (After fresh install as well as normal reboot), it does not see my 5GHz connection (rather it doesnt identify any 5GHz connection). It finds all 2.4 Ghz connections fine. After I connect rpi to 2.4 Ghz connection and do a refresh in "Connections" tab. It identifies my 5 Ghz connection(and others as well) fine, and there is no issue connecting to it as well.
Well I have been using my rpi this way, but it is kind of frustrating.
I have done multiple resets, changed sd card and did a clean installations as well. But the issue stays the same.