Don’t be alarmed, this is expected. Currently third party products (such as ours) will not show up in Native Access, though NI are planning to add support for third party products in the future. Activation of your Output instrument is handled inside of Kontakt as normal by clicking the ‘Activate’ button, but at this time you cannot access your Output products directly in Native Access. NI had provided a list of supported products here:
You will still be able to find your Output products in Service Center.