When I long click on Audible (an app for e-book listening) it has an option My Library which takes me straight to the Library section of the app. I can hold and drag it out onto the home screen, but the name and icon is fixed as per the screenshot.
In order to customize it I am using Shortcut Maker, but I cannot find the proper link to Audible's My Library anywhere, so I've come to the conclusion that I probably need to edit the intent.
The good news is that we know it's possible to create a shortcut to My Library, but the bad news is that I'm too stupid to figure out how.