Dear friend,
After waiting them over 01 hour on phone, I reached IRCC staffs(CBSA) , they told me that " Actually, everyone needs their own AL, but relatively, the PA (with COPR post 18th March)is the one who have PR with AL, and your spouse and your children are your immediate family members so they will not ban us to enter Canada from the same flight. So far, there are no case being banned to enter Canada like that. The important thing is the airline allow you to board the flight or not. With CBSA, it's not their concerns.". By the way, I sent other emails to IRCC for AL for other family members, but still have no news (I used the IM006 documents which state I have sister in Canada). Next week, I will use the IM006 of my mother in Canada for my children, and hope they will have AL for them as they are also extended family member of my mother, but for my wife there is no luck to have IM0006 for herself. So at the boarding time, we will go to airport together, in worst case, if my wife is not allowed for boarding at the same time with me and my children, she will take the other flight in the next 2 days( But I think It may not be happened).