Cisco Nexus switches support sflow export from the device. Please configure the below commands in the configuration mode:
feature sflow
// follow this for all the interface of the device.
sflow sampling-rate 4096
sflow max-sampled-size 256
sflow counter-poll-interval 60
sflow collector-ip {NFA server IP}
sflow collector-port 9996
sflow agent-ip {Any L3 interface IP}
sflow data-source interface {interface name}
Post configuration, you can discover your device by navigating to Inventory > Devices or Network > Flow Analysis