I haven’t found any database templates for Canadian employee time sheets and payroll. I’ve looked:
https://extensions.libreoffice.org/en/extensions
Would be radical to have something open source.
Don’t know if there are examples in English, but here are a lot in German:
Base: It’s called “Beispieldatenbanken”.
You could find these examples also here: Datenbanken
… but all this I have created for German language.