Unable to change SSID for specific band

Looks like with the new XB8 we can no longer change SSIDs for different frequencies.

I have a need to put the 6ghz band on its own SSID for a VR headset, which would force it to always use the 6ghz band. However, it seems I cannot do this.

Is there no way around this? I tried MAC filtering to block the MAC of the headset from the 5ghz and only allow it on the 6ghz but it didn't work.