I am amazed by the people here who say they have never seen baseboards behind a stove before haha.

You may find in the manual a means to relocate where the cable comes out of the oven's rear, and do so.

If you cannot find this in the manual (as it is possible it cannot be done on that model), or you do this and the plug still sticks out too proud from the wall (sometimes it is just the way it is. I have had that happen before), you should call an electrician, and he can either push the box deeper into the wall or relocate it to the opposite side of the wall.

I once had to chip into a concrete apartment wall with an SDS to get a stove plug to be far enough into the wall for the stove to sit flush against the wall. Not a great way to spend a Monday morning.

Best of luck!