The technology is not currently being implemented in the manufacturing process for any vaccine currently being made. To suggest otherwise is disingenuous. As an example of the damage that suggestion does, look no further than the other comments under your post - This is fuel for the fire if you're part of the anti-vax crowd.

I also want to point out that blockchain identification is inherent in the design of ID2020, so even if it was implemented, it would not give a central database a way to track everyone, only a way to look up an individuals vaccine history at the time of scan, similar to how Google and Microsoft's data sharing for COVID is operating.