Can the kitchen sink face the kitchen door?

Yes, you can. Generally speaking, in some places, folk customs think that you can't face the bedroom and the outside door of the house.

Any other door will do. But you should only focus on what some people in your family believe.

If not, please feel free. It mainly depends on your habits and convenience.

It should meet individual needs, be people-oriented, adapt to local conditions and vary from person to person.