What can an OPP officer do on normal roads?

any cop can give you a ticket on the high way no matter what region they inforce, usually they respect there own boundries but that is not a get out of jail free card, also opp is contracted to patrol the 407 but if a metro cop is using the road and sees you speeding etc the can for sure write you up

Just note. Cops can’t give you tickets on private property. Such as a loud exhaust in a parking lot, can’t touch you. They can however pull you over.

yes they can, only they cant get you for stuff like speeding bc there is not posted limit, but they could get you for dangerous driving, i few my friends have been ticketed on private property