All citizens of the United States are currently being tracked by GPS through via the “surveillance system“ created as a result of the relief bill. The “social distancing scoreboard” is a publicly available tool.

https://www.unacast.com/covid19/social-distancing-scoreboard

In order to opt out though, you would think you need to simply put your phones IDFA (Identification for Advertisers Number) into the system so they can remove it. But they actually want you to provide your IDFA in ADDITION your full name and email address, thereby attaching your phones unique ID to your name.