Apple Notes Is Disappointing Me (Or Perhaps It's iCloud?)

I have decided to use Apple Notes to log stuff in my life, with the promise from Apple that, firstly Apple Notes sync across my iPhone and my Mac, and secondly, I can manipulate notes using Shortcuts. I've created a new Shortcut on my iPhone that asks for a line of text input, and the Shortcut will then append the current timestamp and that line of text into an existing note. This is working fine,…