Connect to hidden product?

We are using a separate site for niche items, but still want to use the Shopify backend. The niche site uses the Woocommerce connectivity with Learn Dash, so when the product is purchased, the classes are available to the purchaser immediately. Is there a way to use this with items that are hidden on Shopify? We don’t want these items viewable by our store visitors. If we use ‘buy buttons’ from Shopify, we haven’t been able to link the sale back to Learn Dash.

Thoughts? Help?

Thank you!