Rolled paint on wall has a patch that goes completely flat (not colour but flat as in looks like it wash brushed not rolled)
Looking at your photo that is a patched area that the person that did the patch did not know to texture it. I would rough up the area a bit with sandpaper and get a can of orange peal texture shoot the texture heavy in the center and fade to the outside (do not mask off the area or you will see the lines. After the texture is dry repaint and it will look better.
Matching texture can be very tough but orange peal (what you have I’d the easiest).
The trick is to go slowly where there is no texture and quickly where there is some.
Or have the spray can 8” in the center and as you approach the edge pull out to 16” . This will fade the repair and hide the repair.
Paint as normal note some spray textures need primer some don’t when it is a small patch like you have I use a can and the texture that seals itself or no primer needed.
Shake the can often and have plenty of fresh air some of the spray textures are kind of nasty to breathe. Read the instructions.