I live in Canada and buy stuff from the US all the time and have so for decades. According to the last Free trade agreement, that the current US admin is no longer honouring, there was no duty to personally import any US made good into Canada , only sales tax, and the reverse was true as well. The only exception was alcohol, and the high levies for that are provincial , with each province doing it’s own thing.
I bought lots of audio gear from the US, never any duty, only sales tax.
Trump may have a point in that on an industrial scale we may have duties for US dairy products. The reason for that is because dairy is about 30% cheeper in the US because the US government heavily subsidizes that industry. and the Canadian government much less so these help duties keep our dairy farms in business. US dairy is cheaper than the UK, Australia, and much of the EU as well . Looking at trade deficits when only accounting for goods no longer makes sense. One needs to look at services as well like Netflix or hydroelectric power which gives a bigger picture of what the economic scene is.