`This feature is not supported with the current applied license`
In NSX 9.1, vDefend features (including DFW) require the License Hub component for license management. While other VCF components are licensed through vCenter Server registration to VCF Operations, vDefend products specifically require License Hub to authorize security features.
To enable DFW features, deploy and configure the License Hub appliance in the environment.
For further assistance, see Contact Support. Scroll to the bottom of the page and click on your respective region.