Map views can be inherited like any other view, however the customisations are much more limited in terms of layout compared to the form or kanban view. 

The view to inherit in this case is 'project_enterprise.project_task_map_view'. Odoo has documentation on inheriting views (https://www.odoo.com/documentation/13.0/howtos/backend.html#view-inheritance) if you have programming experience, otherwise any developer should be able to get this sorted for you.