check this link
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/express-entry/apply-permanent-residence/police-certificates.html
It clearly says
For the country where you currently live
The police certificate for the country where you
currently live:
- must be issued no more than 6 months before the date you submit your application
- must not be expired
For any other country
For any
other country, the police certificate must be issued
after the last time you stayed there for
6 months or more in a row.
Some countries put
expiry dates on their police certificates. If you have a police certificate that expired, include it. We’ll accept it if:
- it was issued after the last time you stayed there for 6 months or more in a row
- it is not for the country where you currently live
An officer may ask for a new one later on.
Dont worry if you don't have expiry date on your PCC and you haven't visit that country you should be all set