I'll be flying soon SYD-YVR-MEX and have long layovers in Vancouver in both flights (6ish hours and 10ish hours for the return flight). I'm wondering if, given that it's an international to international connection, I'm allowed or not to go outside of the airport (I'm thinking on just waiting at the airport for the 6h connection and try sleep a bit after a long trans-pacific flight, but would like to go to the city on my way back to Sydney). I'm flying Air Canada if that makes any difference. Any help or pointers will be appreciated. Worst case I'll have to wait in the international zone for a some hours (which is good, considering that it's gonna be the first travel after a long time). Cheers!
EDIT: Mexican Passport (So I have to get eTA), fully vaccinated.