Congratulations!
The ending is open to interpretation: the protagonist either finds someone, or he doesn't; whatever you believe will happen according to your experience is canon.
i get it now! touch grass is the canon sequel to the apocalypse of you!
Indeed
given some of your other games are also interconnected, then the protagonist of this game also could be anywhere in one of your newer games!
Perhaps... You won't know unless you try them all ;)