Hii
Could you try 1.3.6.1.4.1.9.9.91.1.1.1.1.4.xxx OID to get the RX and TX sensor value for the transreceiver and 1.3.6.1.2.1.47.1.1.1.1.2 to get index value of interface through description.
It's working fine in Nexus N9K-C93180YC-FX.
Thanks
Dipti Ranjan Dash