Workflow Forms are highly customised, so there is no simple fix for this. It requires investigation into a view or stored procedure in SQL. Usually a flag on the user or resource record determines whether someone appears as an approver when approval is driven by a view or stored procedure.
Open **Workflow Forms Designer**.
Select and edit the relevant form.
Click the **Approval** tab.
Select the approval stage that needs updating and click **Edit**.
Identify where the list of users comes from:
If the list comes from a set of specific users, add and remove users as required.
If the list comes from a stored procedure or view, engage with an Access Consultant who can review the stored procedure or view in SQL, identify how users are flagged as approvers, and provide guidance.