Canada has been doing pretty decently when compared to other countries. It's not all about pandemic spending. Challenges on the supply side have had a huge impact globally (e.g., chip shortages, production slowdowns in China, fuel prices).
If there are supply side shortages wouldn't that make the inflation rate higher? I would imagine it would at least affect the PPI as import shortages impact supply prices and that could still trickle through to the CPI.
Sorry, I misread your initial post. There are a number of factors that can lead to differences including the overall structure of the country's economy (e.g., being more resource-based), how fiscal stimulus is spent, what supply chains are impacted and the extent, trading relationships). For Canada, a significant factor is the Bank of Canada, which is kept at arm's length from Government with a focus on monetary policy. They have a lot of interesting publications - and some regular reporting: https://www.bankofcanada.ca/publications/mpr if you're interested in digging in.