Hello. Is the SSID using a hidden broadcast or set to “legacy” 802.11 mode? What's your router model and is it broadcasting on 2.4 GHz, 5 GHz, or both?
Search for PowerShell, open it and run:
Get-NetAdapter | Get-NetAdapterAdvancedProperty | Where-Object {$_.DisplayName -match "Band"}
Can you please share a screenshot of the result or copy and paste the text?