It seems really strange to me that there is so little visible of the surface in this image, it mostly appears to be the deck of InSight. Why is so little visible?
That image was taken by the Instrument Deployment Camera (IDC). It's located on the arm. With the arm in stowed position, it's logical that a section of the deck is in view.
In other words, it's an engineering instrument, not a science instrument.
To add to Hobbes' answer: InSight hasn't unpacked yet for its stay!
There is a lot of equipment which was packaged on top of the deck for transport, which will be moved to their proper places over the next weeks. The white tubing on the right and bottom edges of the picture is the robotic arm, to which this camera is attached to. The arm's grapple is in the bottom center. The metallic box on the left side is SEIS, which will be placed on the surface of the planet along with HP3.
There is a second camera (the ICC) below the deck, which would be unobstructed if not for a dust cover that has dust on it. This camera was more affected than the IDC by dust kicked up during landing, because this camera is below deck versus the IDC which is above-deck. You can make out a rock and a lander leg near the bottom of the image.
The next steps are to active the arm and use it to remove the dust covers of both cameras. The ICC should give a nice panoramic view of the nearby terrain, unobstructed by the lander. The IDC is on the arm and will be moved to various vantage points to survey the terrain and get close-up images of the nearby objects, unobstructed by the lander.