Hi,
Please check this KB for the update sequence. VMware Knowledge Base
The interoperability in your environment supports these latest versions:
vCenter 6.5 U1
vSAN 6.6.1
VIO 4.1
NSX-v 6.4.0
Interoperability:
NSX Upgrade Guide https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.3/nsx_63_upgrade.pdf | https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.4/nsx_64_upgrade.pdf
vSphere Upgrade Guide https://docs.vmware.com/en/VMware-vSphere/6.5/vsphere-esxi-vcenter-server-65-upgrade-guide.pdf
VIO 3.1 Upgrade Guide Upgrade to VMware Integrated OpenStack 4.1
VSAN Upgrade Considerations Storage and Availability Technical Documents