If Windows 11/10 desktop icon spacing has suddenly changed and is now messed up, then you can change the spacing to the default value by following this tutorial.

Lee says this is unusual but makes the system’s configuration stable – even though it means that the planet repeatedly moves through the narrow space between the two stars.

If you wish to restore Explorers' classic icon spacing, you need to decrease space between the items (Compact view) in Windows 11.