SFP rx level



I use a Hot Lava 6-SFP-ports card in my VyOS box.
It works perfectly, but I was wondering if I have any tool available in VyOS 1.1.5 to get the TX/RX optical levels from the card.
It seems the ethtool command available in VyOS 1.1.5 does not have the capability.

Any ideas ?

Thank you