Is this installed, or portable?
If it's not installed you're not going to have a desktop or start menu item unless you create them. I have never used the Atom text editor, or seen it under Windows, so I suspect it's third party.
Brian - Windows 10 Home, 64-Bit, Version 1903, Build 18362
A learning experience is one of those things that say, "You know that thing you just did? Don't do that."
~ Douglas Adams (1952-2001)