Cancel button not showing for custom doctype

we are created one Submitable custom doctype, after submitting the record not showing the cancel button.
The user created submitted the document. the user role is System Manager.

Even though the user has the system manager role, you still need to grant cancel permission for that role in your custom doctype. In custom doctypes, cancel permission is not automatically assigned, so you’ll need to set it manually. You can do this either in the doctype permission rule or by granting it in the role permission manager

thank you for the support