YYZ to TPE - Upgrading Economy to Business - Eva Air booked through Aeroplan

Hi All,

I'm planning flight trip to Asia and returning from TPE to YYZ in 2026 and would like to book it using my aeorplan points. Eva Air releases only one business class seat but several economy seats for redemption. Has anyone tried to pay to upgrade the economy seat to a premium economy or a business class on this flight? I need two seats and am thinking about booking one Business one Economy and then try to upgrade.

Thanks!