It is only an API present for official health authorities to use for their app.
As long as you do not have such an app installed, nothing is traced or logged. The API just sits there unused and inactive thus beeing not accessed by an app.
Normal developers cannot use the API, only government healt apps can. There're tons of articles explaining the API and how it is used out in the wild. Go and read a bit about it to better understand and calm down 😎
Stop worrying so much!