The grades and assignments that are reported from Canvas in the PALCS School Lobby are refreshed regularly, so they should be in sync. However, if there is an assignment that is still being marked as "Overdue" in the PALCS Lobby, while being completed in Canvas, it might be because of a recent change. As of February 2024, when an assignment receives a grade of "0" it will still be marked as "Due" and "Overdue." This change was made to combat "Bogus assignments submissions" in which Students were submitting blank or incomplete work solely to remove the assignment from the PALCS Lobby.
If you think an assignment is marked overdue / due in error, reach out to your teacher for clarification.