Trademark owner is not an Amazon seller. Can I complain to Amazon about infringement?

You can complain to them.

Article 57 of the Trademark Law stipulates that any of the following acts is an infringement of the exclusive right to use a registered trademark:

1. Using the same trademark as its registered trademark on the same commodity without the permission of the trademark registrant;

2. Without the permission of the trademark registrant, using a trademark similar to its registered trademark on the same kind of goods, or using a trademark identical with or similar to its registered trademark on similar goods, is likely to cause confusion;

3. Selling goods that infringe the exclusive right to use a registered trademark;

4. Forging or manufacturing others' registered trademarks without authorization or selling forged or manufactured registered trademarks without authorization;

5. Changing its registered trademark without the consent of the trademark registrant, and putting the goods with the changed trademark on the market again;

6. Deliberately providing convenience for infringing upon the exclusive right to use a trademark of others and helping others to infringe upon the exclusive right to use a trademark;

7. Causing other damage to the exclusive right to use a registered trademark of others.

Once you find that the trademark has been infringed by others, please actively use legal means to safeguard your rights and interests.