When setting resolution bellow desktop resolution, the game will appear in a small window. Fullscreen borderless should be always maximized.
It's not called "borderless fullscreen", it's called "borderless window". This is how borderless works in literally every single game. Play it on fullscreen, or set your desktop to the resolution you want to play Cyberpunk at before launching the game. Also, there's dynamic resolution settings which you should check out before lowering the main resolution.
I'm not sure you understand the issue?
There should be three options under video in CP2077-- Borderless, WIndowed Borderless, and Fullscreen.
It seems those of us playing on Windows 7 are only getting options for Borderless and Windowed Borderless. The Fullscreen option is *not* appearing like it is for Windows 10 users.
From what I understand Cold War had a similar issue at release