To report a DMCA on Shopify, you will need to contact Shopify's DMCA Agent directly. You can find their contact information here: https://www.shopify.com/legal/dmca-agent.
Once you have their contact information, you will need to send them a detailed notice of the infringement. This should include:
-A description of the copyrighted work that you believe has been infringed
-A description of where the infringing material is located on the Shopify site
-Your contact information, including your address, telephone number, and email address
-A statement by you that you have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law
-A statement by you, made under penalty of perjury, that the information in your notice is accurate and that you are the copyright owner or authorized to act on the copyright owner's behalf
-Your physical or electronic signature
Once the DMCA Agent receives your notice, they will investigate and take appropriate action. This may include removing the infringing material from the site.