1 channel mode in Windows on Antelope Zen Quadro SC?

Hi all

This is my first post and I'm a complete newb, so apologies in advance.

I got a AA Quadro Synergy Core thinking it'd be great for a streaming project, with routing options etc. I'm on Windows 11, and it seems I can't output to 1 channel (in Sound in Windows Control Panel) - it's 2 channel mode or else. This means when outputting my SM7B directly into apps from the 1/2 channel, it only comes out on one side.

Does anyone know a workaround that doesn't introduce latency? All my cheaper interfaces to date supported 1 channel mode in Windows. Doesn't make sense to me why this thing wouldn't support it.

Thanks!