It is not so easy to get into Canada these days.
I have some NY friends who just crossed the border to visit family there. You have to pre-register with proof of covid vaccination, be approved, then you can enter.
If you are not covid-vaccinated, you must provide proof of negative covid test taken with 72 hours of entering, pre-register, and then quarantine for 8 days once you arrive there.
They will have a digital trail if he wants to (or did) enter Canada.
Use ArriveCAN to enter Canada - Canada.ca