The 'Copyright' element can be selected below the tab 'Content elements' when creating a new element. (1.14.1)
It is often used in the footer part of a website.
In the 'General' tab you can see that the content element type 'Copyright' is selected (1).
The element uses the regular header field (2), that is not visible in frontend. (1.14.2)
As a result you'll see this:
All rights reserved © 2021