Pdoz
E*POWAH Elite World Champion
It's not a bad idea tbf, not sure if it would have any effect on the motor by changing the front gearing though. I'm based in Brisbane.
I have a giant full e pro 2018, so your motor and cranks . It came standard with a 2x front ( and 11 rear) , but was widely criticised in the press for being oldfashioned / the 2x being unnecessary etc. Giant has responded to fashion / advertising / public perception by going 1x on the trance, but your lbs should be able to help you upgrade. If you'd like to go down this pathway and would like a near new xt shifter mechanism, pm me a postal adress and I'll send you mine.
Nb DO NOT go for the standard giant fsa front sprockets!!! I'll spare you the trauma of puctures of my snapped sprocket.