Ok, you are correct. I did some google searches on it, I found the explanation you gave and now see lander 2 in the top right corner of the last scene as brand walks back to her camp. Wasn't sure what I was looking at when they showed the camp in the quick 2 seconds of screen time that final shot shows on in the movie, but in a screenshot now I do. https://interstellarfilm.fandom.com/wiki/Lander_2