Other editors, at least, display a pop-up indicating that the file has changed on disk in the meantime and ask me if I want to reload the file or overwrite it with my current buffer, or do nothing (geany editor does that, for example). And it happens immediately as soon as I hover over the editor's window.

Interestingly, Zed displays the change right away for the first time, but any other edits are not picked up. I'm using Zed's installer, Zed updated to the latest version, no containers or virtual fs, my partitions are ext4.