If you had to describe two locations, an "entry" and an "exit", what one word would encapsulate both meanings? For example, I would describe them as "access locations". But I want a single word that means that.
An Access or Accessway
accessway: a path, route, etc., that provides access to a specific destination or property, as to a public beach or state park
How about door? From Lexico:
door: A hinged, sliding, or revolving barrier at the entrance to a building, room, or vehicle, or in the framework of a cupboard
Doors are entrances to interior spaces and exits to exterior spaces. That is, they address both entry and exit, depending on one's direction of travel.
In the context of buildings, @RichardKayser's suggestion of doors/doorways probably makes the most sense.
In more general circumstances, another word of use, defined via Merriam-Webster, is
passageway: a way that allows passage
Entrances and exits enable passage between spaces.