Manually bringing a product back for sale
After a product has been removed from sale on the online store sales channel, it is perfectly possible to bring it back.
To bring it back, navigate to the product as you normally would in Shopify’s admin.
Once in the product, click the ‘Manage’ link in the ‘Product availability’ section.
A popup will appear. Simply re-tick the ‘Online store’ option, click Done and then save the product.