Hi,
Import of Due date field changes does not come out-of-box.
However, there is one workaround you may want to try.
If you use the eazyBI add-on for Jira Server, you could create a new Jira MISC calculated custom field (in Jira using free add-on) that can be defined and imported in eazyBI.
Please read about one of the use-cases here:
https://docs.eazybi.com/eazybijira/data-import/data-from-jira-and-apps/jira-misc-custom-fields#JiraMiscCustomFields-Previousduedates
Also, there could be a workaround where you import all the due date field changes as a separate measure in eazyBI and then use in reports to find the counter of due-date field change per Time.
For more details on this approach you may want to reach out to eazyBI support
Martins / eazyBI support