> For example, there's no equivalent to "long tap" on macOS Control Centre, nor does right click do anything.

Long-press isn't a macOS convention, which I assume is why there's an "Edit Controls" button at the bottom of Control Center for macOS. Right-clicking controls does show contextual menus as you'd expect.

> …a cursory search suggests there's no way to map a shortcut key to a Control Center action…

Desktop power users can (1) Fn-C and tab through them (as you said), (2) navigate Control Center using macOS's usual keyboard accessibility features, (3) create keyboard-activated Shortcuts, (4) use third-party utilities like Keyboard Maestro and Karabiner-Elements, etc.

I understand that Linux has solved this problem, but it's interesting to see Apple's progress on harmonizing their OS/device experiences over the last decade. I expect that there will always be shitty individual UI details you can pick on if that's your thing, like this detail from macOS 26.0's Calendar: https://imgur.com/a/BYalaa1