Even worse, and likely illegal(!), the warranty has terms that are likely against FTC guidelines, like voiding the warranty if you disassemble the robot. As far as I know, these type of terms are not valid. They also include terms saying your warranty is void if third party service or parts are used - these are also not valid under the Magnuson-Moss Warranty Act.
https://unitree.com/terms/policy/
https://www.ftc.gov/business-guidance/blog/2022/07/ftc-annou...
https://consumer.ftc.gov/consumer-alerts/2022/07/ftc-says-co...
https://www.ftc.gov/business-guidance/resources/businesspers...
https://www.ftc.gov/legal-library/browse/statutes/magnuson-m...
https://en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty...