Rx Discards on switch

I have two Dell PowerEdge r740 servers (RHEL-8 Operating System) connected to each other via SFP+ cables. I want to enable UDP-Fragmentation-Offload on the interfaces connecting these servers. When I try to do it with ethtool, like this:

$ethtool -K eno1 ufo on

I get:

unable to change UDP-Fragmentation-Offload. Unable to change any device features.

UFO is off on the interface. I am sure the NIC supports it because ethtool shows it as off, not as off [fixed]. I want to know are their any drivers etc. missing? What could be the reason?