Floridadreaming75

You can certainly enter and then return to Canada to tie up loose ends, finalize the sale of property, arrange shipping of belongings, or similar, COVID requirements and restrictions permitting. But you cannot “continue to reside” in Canada. 
 
The purpose of the visa is to live here permanently. I don’t quite understand the comment about looking for work. It’s been decades since anyone looked for work on foot. Nowadays even a 7-11 store hiring a cashier will want the application to be submitted online. You can do all your job searching and applying before you move. I applied for, was interviewed by Skype for, and offered my position here before I even had my embassy interview and without putting a toe on the company’s premises. I appreciate people will want to see an apartment and a neighborhood before committing to purchase or a lease but you can stay in an Air BnB or hotel whilst you search. 
 
If your husband is a dual citizen he is welcome to enter the US at any time, even before your visa is issued, to look at apartments, etc. You can also come to the US to visit to make such preparations whilst you wait for your appointment, COVID restrictions permitting.  

it is to permanent live in the USA. That’s what the P in LPR stands for, permanent.  
 
You can go to Canada to visit.  Hopefully you can afford the $2000 for mandatory quarantine in a government mandated motel 6. 
 
On your return to the USA, if CBP believes you are not acting as a permanent resident of the USA, best case you will get a warning. Worse case an ugly secondary inspection, pressure to relinquish your LPR status, and if you resist, a date with immigration court to revoke your status.
 
You are expected to spend the majority of your time in the USA.   
 

Hi,
 
Once you cross with your immigration visa and become a legal permanent resident of the US, you are required to live here.  You can not continue to reside in Canada.  To be eligible for your immigration visa, your husband will need to show his intent to reestablish a US domicile (US resident) upon your entry into the US.   As a US LPR, you will no longer be eligible for provincial health care in Canada.  

You can always postpone your medical exam and visa interview to delay the immigration process.  

Visa interviews are not conducted inside the US as there are no US consulates inside the US.  Short visits are allowed (with proper documents) at the discretion of CBP, but you cannot live inside the US during the process.

The correct answer is no. Just had our DS-260 approved  we are in the same boat. Hubby a US citizen and living here in Canada with myself and US citizen son.   Awaiting our interview appointment.