An external meter bridge via USB isn't possible in my mind. The latency would be a problem and I don't think DAW's have the right setup to send signals to a meter.
You could of course ignore the 15 msec or so latency, but it would still pose a problem to Windows, as that doesn't know how to do multi interface setups.
You could include the metering in an interface. But since none exist, I think there are some problems with the idea.
If someone finds such a thing, I'm interested. I like to have meters and leds
You can find external, professional metering with all kinds of options, but these all are directly connected and not USB. And they're not cheap either.