the properties of the sexaquark particle match those expected from a dark matter particle and it can additionally gives a hint of the matter-antimatter asymmetry in the universe.
Before I got to this sentence, my question was going to be what the properties of a sexaquark would be. But does this imply that a sexaquark may itself be a dark matter particle? Or just a particle with shared traits? How would we go about telling the difference?
The guy is stable and very weakly interacting (it does not couple to most particles). Those are the basic properties for a dark matter particle. Its properties then allow it to escape all direct dark matter detection bounds, and it could even help to explain star formation.
So, if the sexaquark exists (it is so far predicted theoretically but not observed), it could satisfy all the requirements of dark matter.