I'd argue if you need to be told about keyboard shortcuts, then you're not a power user. (I.e., knowing how to find keyboard shortcuts I'd consider a core trait of power users).
My perception is that on Windows it is standard to display keyboard shortcuts next to application menu items, whereas on the Mac, that doesn’t seem to be the case. Perhaps that’s just a culture thing. It’s expected on Windows, and not as expected on Mac.
macOS does this too (if I'm following correctly), you can see it in the "The Apple Menu in macOS Ventura" screenshot on this Wikipedia page https://en.wikipedia.org/wiki/Apple_menu#/media/File:Apple_m... it's done for both application keyboard shortcuts, as well as system shortcuts (as in this example).
For completion, system shortcuts are also available in `System Settings > Keyboard > Keyboard Shortcuts...` (where they can also be changed). (Although I don't think that's 100% comprehensive, e.g., I don't think `⌘⇥` for the application switcher is listed there.)
