Both the AMEX line and the NEXUS lines at security were suspended at YYZ (Toronto) until further notice as of August 5, 2021 in order to prevent the spread of covid19.

Thankfully business class passengers are not at risk for getting covid19 and can still use the priority lane.

Standing in the packed, long, snaking, security line with all the other passengers is much safer for NEXUS and AMEX cardholders than using the priority line. And again, business class passengers are somehow still able to use this line without any covid19 risk.