What is NSX-T ?

NSX-T provides customers a way to run software-defined networking infrastructure. NSX-T data center provides networking, security and automation for cloud-native applications, bare metal workloads, multi-hypervisor environments, public clouds, and multiple clouds. NSX-T is designed to address the needs of these emerging application frameworks and architectures with heterogeneous endpoints and technology stacks. NSX-T allows IT and development teams to choose the technologies best suited for their particular applications.

Logical overview of vSphere Switching Components, where NSX-T fits and how the Nutanix platform interacts with them

NOTE:  NSX-T support is only available from AOS 5.16.1/5.10.9 and above.

For more details please review below KB: https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000CsyzCAC