Sometimes the scroll trick feels too loose, and the presets aren't precise enough. If you want to change the scale of everything (not just icons, but text and taskbar too), you need Display Settings:
The following feature allows users to adjust the size of desktop icons in Windows 11. windows 11 desktop icon size
For users who want to change the size of icons alongside text and other interface elements, or those looking for a permanent "under-the-hood" fix, advanced settings are available. Sometimes the scroll trick feels too loose, and
Here's an example C# code snippet to adjust the desktop icon size: but text and taskbar too)