The US Congress is trying to enact the Hong Kong Human Rights and Democracy Act of 2019. Why hasn't Canada tried too? Canada has many Hongkongers. Or are there more CCP Chinese than Hongkongers in Canada?
I suspect it has something to do with the level of pressure China can put on Canada, compared to how much Canada can fight back against that coercion.
As a result of the arrest of the Huawei founder's daughter - a much less direct challenge than to support HK protesters - we have had severe trade disruptions, 2 citizens, one of which an ex-diplomat, jailed on trumped up charges and another Canadian, a drug dealer, has had his sentence bumped up to the death penalty.
For our pains in acting on a US extradition request, we had President Trump shortly afterwards Twitter that the whole thing "could be fixed with a deal".
I suspect that, at this point, only a coordinated and concerted effort by Western countries to diplomatically punish China for its suppression of HK citizen rights would have much effect. And this is the kind of situation where recent US unilateralism and unpredictability makes that level of coordination less likely than usual.
So Canada's sitting this one out out of caution/timidity, yes. But I honestly doubt too many people are sympathetic to the CCP, even among more recent immigrants.
Why hasn't Canada tried too?
Your question should be about why the United States is doing it. Although the two countries share similar values, Canada doesn't have a strong government unlike Trump's administration. In fact, Canada is well known as being "weak" and "dishonest" (https://edition.cnn.com/videos/politics/2018/06/09/trump-justin-trudeau-g7-communique-tweet-nr.cnn).
Evidence? Apart from the US which Trump is leading, what other country is backing up democracy? The UK? No they are not doing it. Japan? No they are not doing it. India? No they are not doing it. It takes only Donald Trump to enforce modern democracy.
Donald Trump is backing the Hong Kong Human Rights and Democracy Act because he believes the American policy is consistent to the stability of Hong Kong.
"The president has also said that he wants to make sure that China treats the individuals there humanely," added Pompeo. "Those are the things that are at the center of American policy with respect to Hong Kong."
Mike Pompeo has promised Donald Trump will be taking a harder line on China. (https://www.scmp.com/news/china/politics/article/3038015/us-secretary-state-signals-donald-trump-taking-harder-line). Who else other than Trump will be taking a fight against the Chinese?
Canada is not doing bad, but there is only one Donald Trump. Canada would be doing the exactly the same thing if Trump was the Prime Minister of Canada.
Or are there more CCP Chinese than Hongkongers in Canada?
Irrelevant. As long as Trump is leading the country, the US will always enforce democracy.