I am not sure, I have experience when you married after AOR but I am not sure to be honest if this changes if you were married beforehand.
However, based on the correspondence I received from IRCC a while ago this might be possible:
"Thank you for contacting Immigration, Refugees and Citizenship Canada (IRCC).
If you are the principal applicant of a permanent residence application already in process, you could add your spouse or common-law partner, dependent children, and their dependent children to your application,
even if they were listed as a non-accompanying dependant in the initial application.
To do so, we invite you to send your add-on request through the
IRCC webform available on our website. You can attach the following forms and documents in the field reserved to that effect:
- A new Generic Application Form for Canada (IMM 0008) with supporting documents,
- (If applicable) A Schedule A - Background/Declaration (IMM 5669) form,
- (If applicable) An Additional Dependants/Declaration (IMM 0008DEP) form,
- (If applicable) A signed Additional Family Information (IMM 5406) form,
- A copy of the birth certificate, marriage certificate or proof of common-law relationship,
- A copy of the family member's valid passport,
- Police certificates for all countries where the family member over the age of 18 has lived for more than 6 months since turning 18,
- A letter of explanation, and
- If applicable, the proof of payment."
To do this, the only thing you'd need to do is inform them you need to add your spouse as a dependent to your application using a WebForm, then you should received a similar response indicating the documents you need to submit. In theory you score will not be recalculed.