It was the same case with my parents and many others. You can call IRCC and confirm with them. also please see the link below, but if you still have doubt, please do call IRCC and confirm. It will help others as well.
See the links below, i know it applies to express entry but this is what i follow generally/
https://www.canada.ca/en/immigratio...ress-entry/documents/police-certificates.html
https://www.canada.ca/en/immigratio...al-police/police-certificates/how/canada.html
Who needs police certificates
Our online system will ask for a police certificate for:
- you and your family members who are 18 years or older
- and
- every country you (or a family member) stayed in during the last 10 years for 6 months in a row or longer
You
don’t need to give us police certificates for any period of time before you were 18 years old or
for time spent in Canada.