b2c-crm-sync can be used to integrate Salesforce Commerce Cloud and the Salesforce Service Cloud.
Salesforce has provided GitHub reference for the b2c-crm-sync tool.
For more information on the b2c-crm-sync, please check the following Salesforce Reference Article.
Salesforce B2C Commerce APIs can be used to to sync the data.
For more information on the Salesforce B2C Commerce APIs, please check the following Salesforce Reference Article.