https://www.npr.org/2018/10/22/6588...re-inserting-microchips-under-their-skin

a Wisconsin company will become the first U.S. company to provide employees implantable microchips. The company called Three Square Market said in a press release that their employees would be given an optional opportunity to be implanted with a chip.Oct 31, 2019

In 2020, A London based firm called Impli released a microchip implant that is intended to be used with an accompanying smartphone app. The primary functionality of the implant is as a storage of medical records. The implant can be scanned by any smartphone that has NFC capabilities.

Just like computers and the internet, what's voluntary today becomes compulsory tomorrow,,,