Wholesale usually for Amazon FBA, if you do not have clients or do not have similar experience or team, it is a little risky to wholesale, instead, Amazon FBM or Shopify dropshipping is more suitable for startups.
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You can choose both option for your product. Try to list them on Shopify store as well as on Amazon store to make your sales double. Read more about how you can grow your business with the help of amazon business.