actually dark matter is a thing, dark matter is created at high speed collisions. not like car crashes but more like two planets or stars colliding. Interestingly there should be the same about of dark matter in the universe as there is normal matter, but there is only about 15% ish of dark matter. and i got it confused dark matter is with the electrons and the neutrons in the center and the protons circling the two.
that doesnt mean its present in a banana
there is no evidence that dark matter is in regular matter, and we don't understand it as we haven't approached it. Dark matter constitutes areas in space that are blocked from what we can theoretically see (along with black holes), meaning it's kind of like negative existence