According to Canada's website:
If you’re being sponsored for permanent residence (PR) by your spouse or partner, you could benefit from faster processing for a visitor visa.
You may be eligible if you
• submitted an application to be sponsored for permanent residence
• received an acknowledgement of receipt (AOR) that confirms the application is in progress
When your sponsor receives the AOR for your permanent residence application, you can apply for a visitor visa. If you’re eligible, your visitor visa application will automatically receive faster processing. You don’t need to request it.
You must still meet all of the requirements to be eligible for a visitor visa.
Source:
https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/apply-visitor-visa.html