I can't see dates for them in this: https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/certification/vmw-retired-certific...
Retirements are usually announced here: VMware Education Services
Note that a VCP is linked to the calendar year in which you completed the final requirement - I don't know if the VCP-DCV 2021 would also include 6.7-based exams or training.
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