How do I show specific products to specific customer groups on the Wholesale Order Form? – Help Center

First, make sure your Product Restriction is set to Show Products To. If not, the below article can help you change the setting.

To show a product to specific customer groups:

Go to the product you want to show. and click the dropdown under Show Product To.
Select a customer group from the drawer to show product to,
All Customers — Everyone will see the product on the order form
No Customers — No one will see the product on the order form
Logged In Users — Only users who are logged in will see the product
Customer Tags — Select a list of customer tags who will see the product. Here's Shopify's guide on tagging customers.
Click Done.
Hit Save after you've made all your changes on the different products.