By Default Windows OS placed most of the system files are in hiding, So it will protect the system files from accidental Deletion. If you are a techi you can see all the Hidden Files in the windows.
How to Hide and Unhide folders in Windows 11
Open File Explorer and click on the icon ‘Layout and view options’ which can be seen at the Ribbon of File Explorer.
Then select the "Show" option on the Overlay menu and select "Hidden items" in order to show the Hidden files.
Which will show you the Hidden files and folders also you can easily edit the files.
Another method to Hide and Unhide folders in Windows 11 using File Explorer is, From the Ribbon Menu click on the ellipsis (three horizontal dots) on the File Explorer ribbon, then select ‘Options’ from the overlay menu.
Whenever the Folder option comes in front of you, then select "View Tab" and select the highlighted options given in the tab, as shown in the below picture, to Show hidden files, folders, and drivers.
Click Apply, You have done it.