The Canadian Oxford Dictionary has not been updated since 2004 and the entire staff of the dictionary at Oxford University Press was laid off in 2008 (and the editor Katherine Barber sadly died last year). This means that any Canadianisms that arose in the last 18 years are not recorded in an exclusively Canadian dictionary:
Canada’s English dictionary hasn’t been updated in almost 2 decades. What does that say about us? | CBC News
A new dictionary is a huge investment of money and labor, but it is sorely needed.