A fundamental feature of any checkout is the ability to pick a shipment method. Every shipment method that is added to the core is by default already popping up in the LokiCheckout as a radio button. For additional functionality, more features are needed.
At this moment, the following shipping providers are supported. This does not mean that other shpping providers are unsupported - it simply means that for those other methods an integration yet needs to be built (a task that could very between half a day or half a month). Let us know what you need.