Windows 10 Public Desktop icons not showing

In this Directory: C:\Users\Public\Desktop
I noticed some programs are listed there, why are they public and not private?
What does public mean specifically?

If i visit a website and in order to use the website i have to accept cookies, can this website access my public desktop and know which programs are installed there, in the worst case sell this information?
Can programs that i have installed access my public desktop and find out what other programs are linked there?

When i delete the link / shortcut in windows explorer from the public desktop, the icon also dissapears from my desktop.
Can i delete they public desktop entry somehow without deleting it from my desktop?
In the first place, why is it even public?
And who (which program website or company) can access this public desktop informations?

See Screenshot:
https://i.ibb.co/3dP1RKn/Wieso-sind-diese-Programme-im-ffentlichen-Desktop.png