After you get your decission, they will move with his file. Cant process his hile unless your is done. They notify your FD was made so can continue. In my case, my dependents were requested for medical.
As far as I know you can remove your partner from the application even the day before you received your final decision.
I suggest you call IRCC and tell them about that. You must declare all family members but you can choose who of the group will apply for PR.
For better info , call them but it is possible to remove your partner.
Honestly at this point , im giving up. 3 years nothing, and people in 2025 groups saying they getting their PR. I Honestly dont understand how is this even fair. SCREW IRCC