You can safely ignore the alert and force the DSVA deployment by clicking Failed and then Resolve.
For further information, refer to this KB article, Compatibility issue between Deep Security and NSX 6.2.3 (or higher).
Before Deep Security Manager 11.0, when deploying DSVA from NSX manager with NSX for vShield Endpoint license, the "VMware Network Fabric" missing dependency alert will pop up. It is suggested to ignore the alert. The DSVA deployment will be successful, but the status of Trend Micro Deep Security still shows "Failed". You can ignore it as no Deep Security function actually fails.