A project manager's customer is new to agile approaches.

Ensure that the customer and the delivery team agree on the definition of done (DoD) in the beginning of the project.

Invite the customer to join the daily standup meetings to better understand the product design and progress.

Ensure the team demonstrates product features to this customer regularly to collect feedback and improve as needed.

Invite the customer to join the regular sprint planning sessions to better understand the project's progress.