You cannot manage vSAN 7.0 or later, Tanzu, or any modern feature set from this client. Consider this a legacy tool only.
Following the acquisition of VMware, downloads are now hosted on the Broadcom Support Portal. You typically need a registered account to access legacy software. Vmware Vsphere Client 5.5 Download
⚠️ : VMware no longer provides this software on its main download portals. It has been replaced by the vSphere Web Client (Flash-based) and modern HTML5 Client (v6.7+). You cannot manage vSAN 7