f-string not referenced in library

[Caridad Díaz Rivero]

Hi,
I don´t have too much experience using the official python documentation,
and I was looking about f-string and I didn´t find anythings in
/3/library/string.html <https://docs.python.org/3/library/string.html>  and
I find it in  3/reference/lexical_analysis.html#f-strings
<https://docs.python.org/3/reference/lexical_analysis.html#f-strings> and I
didn´t now Why it is not referenced in the documentation of String Library?
Regards,
Caridad Díaz