Hello ! From the dashboard , I have not seen any option to do that ( you can customize it to add it ) . Moreover you could use shell to delete the order . ( I recommend shell plus because it imports every model and you do not have to do it manually
https://pypi.org/project/django-shell-plus/ ). Furthermore in shell do type :
1) from order.models import Invoice, Order
2) Order.objects.get(number = "order number").delete()