Netflow is configured on interface Gig0/2 but still, I don't see any data under this category, I try to explore each interface I get the error as "Data is not available" can anyone tell me if i am missing anything.
Can you please post network device config? you should have a flow record setup, a flow exporter, and a flow monitor. Make sure you also have a destination address set for netflow.
The category information you're looking for is not provided by netflow. It's just provided by NPM. To see netflow stats, you need to look in the netflow tab.
Do any of the other interfaces show any statistics? Can you see interface statistics for other devices? It looks like SNMP is not working correctly on this device.