As documented in the VCF 9.0 release notes (VCF 9.0 Release notes - NSX) VMware by Broadcom has changed the entitlement of the built-in NSX Load Balancer from VCF 9.0 onwards.
General purpose load balancing features are no longer part of the VCF entitlement and Broadcom recommends the usage of the VMware Avi Load Balancer. The VMware Avi Load Balancer provides a superset of the NSX load balancing with additional functionality as GSLB (Global Site Load Balancing), Advanced Analytics, Container Ingress, security, and WAF (Web Application Firewall). For assistance migrating from the standard NSX LB to VMware Avi Load Balancer please contact your VMware by Broadcom representative.
From VCF 9.0 onwards, the NSX Load Balancer is supported only for the following approved use cases:
VMware NSX
VMware VCF
VMware Avi Load Balancer
Environments using VMware NSX 4.X or VMware NSX-T Data Center 3.X entitlements are not impacted and the load balancer can be used for all traffic types (3rd party workloads and infrastructure), until EOL for the respective release as per the Product Lifecycle.