According to the ServiceNow support article1, the it_pps_admin role can configure the default columns in the project planning console by modifying the pm_project_planning_console list view. The admin role can also do this, as well as any other configuration on the platform2.
1: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0714565 2:
https://docs.servicenow.com/bundle/vancouver-platform-administration/page/administer/users-and-groups/conce