SFP Power Tx/Rx monitoring is supported for IBM Storwize/SVC/FlashSystem: 8.4+.
It is going to be implemented for Fujitsu Eternus and Huawei OceanStor Dorado soon.

You can find SFP Power graphs under:

• UI ➡ Storage ➡ Storage device ➡ Port
  
• Total: UI ➡ Storage ➡ Total ➡ SFP Power Rx/Tx