You can use Wholesale Club on the Shopify POS app to create orders for wholesale customers in person.
On the left-hand side of the POS cart, tap Add tile.
Tap App, then select Wholesale Club. Under Actions, select Wholesale Club:
Make sure you select the app underneath Actions, and not App Website
Add products to the cart eligible for wholesale discounts. Make sure to select products in a collection targeted by one of your wholesale discount rules, or a product that has a Custom Price assigned.
Under the More actions menu in the cart, select a customer with the applicable wholesale tag.
Once you've added the correct customer, tap the Wholesale Club tile in the cart:
After seeing a green confirmation banner, your wholesale discount will be applied in the cart.