Depending on your model, some models allow an oversized desktop, but everything starts looking like tunnel, as you need to pan around. Oversized desktops might not let some oversized desktop sensitive applications to open.
Some oversized resolution of an FHD display might me 1152 pixels or 1440 pixels, but setting these resolutions might show the entire screen, depending on your model, whether it has 'auxiliary' pixels, make a tunnel, lower the color depth, show blurry letters, or even turn black and go dead in the worst cases of very oversized desktop sensitive desktop monitors.
I suggest not trying this unless you know that is is true non-oversized desktop sensitive monitors or true very oversized desktop-sensitive monitors. All monitors have the option to hide modes that monitor can't display properly or not. In that case, when a monitor can't display properly, it is the GPU to show the picture which might look poor, depending on how sensitive your monitor is to an oversized desktop.
In that case, you must call the computer model maker to see if it's sensitive to an oversized desktop or not.