Hello.
According to the table of your licenses registered in VMware (My Vmware), the support and subscription contracts are valid until March 2021.
Remember that licenses do not expire, what expires and has a life period is the support and subscription contract. The S&S contract entitles you to support and updates at VMware.
You have 2 licenses in version 6 with support basic and subscription (contract).
VMware vcenter Server Standard
VMware vSphere Enterprise Plus For 1 Prossesro (Total 6)
Additionally you also have 2 licenses in version 7 with support for production and subscription.
VMware vcenter Server Standard VMware vSphere Enterprise Plus For 1 Prossesro (Total 6).
You should only renew the support and subscription contracts of what you are currently using.
It is not clear if you are using a single vcenter server 6.7 and 2 servers (Host ESXi) 6.7 (which would be 4 licenses of VMware vSphere for 1 Prossesor) why so many licenses were acquired or the support and subscription contracts were renewed.
I suggest you read carefully the link you send about licenses so that you can choose what type of renovation is the most appropriate for your environment.
VMware vSphere Compute Virtualization Licensing, pricing and packaging (WH I T E P A P E R – SEPTEMBER 2020)
https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/products/vsphere/vmware-vsphere-pricing-whitepaper.pdf