On each web page, is there a bypass or skip link to the main content region (excluding special cases)?

WCAG Reference

12.7.1

On each web page, is there a link to avoid the main content region or to access it (excluding special cases)?
12.7.2

In each set of web pages, does the bypass or skip link to the main content region meet these conditions (excluding special cases)?

The link is located at the same place in the presentation.
The link is always in the same relative order in the source code.
The link is visible or, failing that, visible when focused.
The link is functional.