Yes you can tether, but you do have to make sure that your personal hotspot name is the same as the APN for the eSIM!
I have Telus and have signed up for Easy Roam (side note: I was previously with Rogers, switched during Covid. With Rogers, you were automatically signed up for Roam Like Home, so I didn't realize that with Telus you had to actually opt in - how stupid). This weekend in the US I got a text from Telus that said "you'll only be charged $12 on days you access your canadian plan's data, or make a call or text in the US. All incoming texts are free."