Hi,
I think it would be great to have an adapter that combines an audio/mic jack with usb C or A. I feel that filling an Expansion card with only an audio port is a waste.
Not an expert on how and if its possible to do
Just an idea 
from someone who’s tired of the wireless world
You’d need to basically embed a USB hub into it, so while it’s possible, I suspect most folks won’t want to bother. Especially since you’d probably want one to handle the USB 3.2 gen 2 at a minimum, if not USB4. There’s also pretty limited space inside the modules, so would need a pretty custom board probably, if you’re going to have much of any kind of DAC in there.