Many years ago I lived in an one-room really tiny apartment. I wanted to visually separate the one-room space to create kind of two or more rooms. You are in a similar situation living in a tiny house or even RV or houseboat.
You might achieve the goal of visual separation by freestanding furniture, curtains or floor tiles. Floor tiles actually work surprisingly well for this purpose. Placing floor tiles, best are vinyl floor tiles, in an open kitchen creates visual separation without using off precious space.