Why is my kitchen water supply so high?
There are faucets not part of the desk but mounted directly onto the wall.
Some of these faucet-things have a heater unit above the tap. As there is only one outlet instead of two this installation could be designed for this kind of tap.

I don't see marks of a former installation on the tiles that could give a hint of what was installed before you came. So you should ask your landlord what is expected to be there. They surely have advice for you.

I assume you have to provide the kitchen on your own when you move in? Then, if you'd like to have something that has the heater unit below the desk, perhaps you can connect this outlet with your under-desk installation. Ask the experts to suggest something that you like.