In Xcode preferences I can sign in to my Apple Developer Account and create developer signing certificates that expire after 1 year.
In my individual project settings under 'Signing & Capabilities' I can use the 'Automatically manage signing' option.
It's confusing to see an option to 'Automatically manage signing' tied to an individual project, when the code signing certificate is global to the Xcode user and used for all projects. So, the million dollar question is, does Xcode automatically renew the user's signing certificate? Or is this option referring to some other certificate(s) specific to the individual project?