Chelsio iSCSI PDU Offload Target

Hello,
I’m trying to offload an iscsi target on last TrueNAS Core 13.3-RELEASE.
I’m following an old pdf from Chelsio (now I have two used T62100-CR)
https://service.chelsio.com/beta/drivers/ChelsioUwire-FBSD-3.3.0.1/Chelsio-UnifiedWire-FreeBSD-UserGuide.pdf
but I can’t find a way to modify /etc/ctl.conf in Core from web interface (i must add " offload cxgbei" to “portal-group”.
Best Regards,
Antonio

When I looked into this, it was more on the vmware iscsi side and it was concluded not to do this.

There are some reasons not to enable offload target?
Maybe performance are not better?
My system is home lab, so I can make some tests.
The initiator is a win11 pro connected directly to truenas Core using a second T62100-CR.
Best Regards,
Antonio