CBP (U.S. Customs and Border Protection) have announced a United States-Mexico-Canada Center to coordinate the implementation of USMCA. The announcement indicates that this center is in collaboration with Canadian and Mexican authorities.
The CBSA has been part of working-level bi-weekly discussions with US and Mexico and that these discussions are focused on information sharing as well as outreach with stakeholders.
On its website, CBSA has a section on CUSMA that provides access to information and resources when importing CUSMA-eligible goods into Canada.