Looks like the new Visio diagrams and Stencils for VMware SDDC 6.0 are out at communities.vmware.com and created by the author Gary JBlake.
The link to download the diagrams is below:
This has been referenced from communities.vmware.com forum under VMTN > SDDC > VMware Validated Designs > Validated Designs for SDDC 6.x > Documents
https://communities.vmware.com/t5/Documents/Visio-Diagrams-for-VMware-Validated-Design-for-SDDC-6-0/ta-p/2782683
Converged, Hyperconverged Infrastructure & Virtualization 