Sub sku , POS vs Webstore

I need to have a sub-sku for a wine product and I need it to be available to the POS ONLY and NOT show up as a variant sku on the website - How do I set this up ? Thanks

To reiterate: you have one product that you want to show up on the website and the POS. You want one specific sub-sku of this product to show up on the POS, but not on the website?

If I have it right, then I am fairly sure there is no way to do this in Wine Direct.

What’s the use case for this?