Do Canadian immigrants still have the requirement of 183, that is, they must stay for 183 days within one year to maintain their identity?

As far as I know, there is no such rule. According to the provisions of the joint immigration law, you must live in Canada for more than 730 days within 5 years after you get the maple leaf card. As for the rule of 183 days, I have never heard of it.

But one thing, I don't know what your immigration type is. If it is an investment immigrant, it is also a federal investment and provincial nomination. It is possible that the regulations in different provinces are different.