Can I travel to Sweden with just the approval email before getting my Sweden resident permit card?

Generally, no. You usually need the physical residence permit card to enter Sweden if you require a visa to enter the Schengen Area.

However, as a Canadian, you can enter Schengen visa-free for 90 days
But you cannot begin work, studies, or long-term residence until the card is issued.
It’s safest to wait until you receive the permit card.