Noobie question flying from PHL to YVR via YYZ


tourist hereWe are Taiwanese passport holderAbout to fly from Philadelphia to Vancouver PHL to YYZ with AC8929YYZ to YVR with AC107In July Do we need to pick up checked baggage ourselves and checked it in again at the counter in YYZ?? Thanks 🙏We are booking directly with Air Canada website Sorry, might be a stupid question But we are flying from USA to Canada (with layover) for the first time