"Canada, whose economy is the second biggest among the TPP-11 after Japan..."
Is this a joke? How do you measure the 'size of the economy'?
By GDP? If so, that's a huge lie and distortion. If by PPP, that's a bit closer (as The Economist has been suggesting for almost a decade).
GDP yields good numbers, when a country's economy is primarily based on services and not production, which Canada's (unfortunately)  is.
Take away the (mostly foreign owned) natural resource extractions, car assembly plants et al and not much is left.
As for Mr. Trudeau's no show, it is not coincidental; he is currying favour with the big boy in the sand box; the US in the NAFTA negotiations.