The vehicle types you have in your system can be disabled/enabled through the admin dashboard based on your company's needs.
To do so, follow the path below in the admin center:
Admin Center → Settings → Operation Setup → Vehicle types → Action (Edit) → Configuration tab → Is active
By enabling this field, this particular vehicle type will appear in the customer applications and panels. If this field is disabled, your customers/dispatchers can't see and select this type of vehicle when creating an order, and your drivers who have only that vehicle type won’t be active either.