will eSim expire if I don't activate it?

[Pku]

I wanted to purchase an eSIM from the Telus website to keep at home until the day I buy my new phone. I don't want to wait a week for it to come in the mail when I actually need it. 

My question is,

If I keep it at home for too long will it expire months from now? A year? 

[NFtoBC]

Why not simply order the e-SIM a few weeks/days before you order the new phone?