With the borders closed, u will need to locate a car hauler/transporter in Canada who can transport the car into the U.S. U will probably at this time require a broker, also.
I did and my advise is to get a broke up front and follow their directions. My seller drove the car across the boarder to meet the transporter
Like @Briz I got my car from Canada. A broker is a MUST or you risk getting stuck with issues. I called the US customs office where the car was going to cross. I chatted up the guy and said "hey which brokers do a fair bit of business there and have clean paperwork?" He hesitated and said, "we can't give recommendations." I reminded him that I did not ask for a recommendation ;-) He gave me a couple of names. The car went through without a hitch. I think it cost me $400 for the broker??