You're exporting the flow from VLAN1. Are you monitoring interface vlan 1 within Orion? You could always change the export to your loopback interface and make sure that is in Orion.
there seems to be an issue with interface indexes not matching those in flows. If you have all interfaces on Nexus managed by Orion and still aren't getting any data, I would suggest you to open support ticket to investigate this more.
I can confirm Orion is monitoring vlan 1.
I will log a support ticket.
Thanks for the speedy replies.