@Andy1985 

There is no seperate band option for the 6ghz as such, like the 5ghz it will simply appear under the WiFi name you have given your network (Deco1235 for example).  Connect to this and if the device supports 6ghz the Deco will move you over to that frequency.

You wont need to specifically select 6ghz

  @Philbert please check is wifi setting for XE75 there is an option for 6GHZ network and i have given ssid name and created password as well.

Attache is snapshot

My new S23 Uktra is compatible wirh 6E wifi but still this is not searchable in my wifi list

  @Andy1985 

Ok so that looks a bit different from last time I used it, likely a new version or firmware.

In the 6ghz settings there were previously 2 things you needed to set.   1 is remove the 6ghz backhaul only setting, 2 was to ensure the SSID was visable.   Might be worth checking these, likely sure you have already.

Take it you have only this one device that is WiFi6?   Namely no other test device?

  @David-TP i have tried opening developer options and made the changed still cannot see band 6Gz.

I have 4 Xe85 and 2 X60 units , is X60 compatible for Band 6Ghz?

Can this be the reason?

  @Andy1985 

Hey

The x60 is not compatible with 6ghz bands.  

The X range of Deco are WiFi6 grade devices, the XE are WiFi6E.  The E refers to "extended" which offers the 6ghz frequency, its VERY new

You will only be able to get 6ghz when in range of a XE Deco

To be honest, unless you have 1gb internet or transferring massive files locally (to a NAS for example) you likely wont see any real performance difference between 5 and 6ghz