I'm a little confused. Are you just trying to add an esim or are you trying transfer esim? From looking at apples guide for it,
“If you contacted your carrier for an eSIM after you set up your iPhone, and they set up eSIM Carrier Activation, follow these steps: When a notification appears that says Carrier Cellular Plan Ready to Be Installed, tap it. In the Settings app, tap Carrier Cellular Plan Ready to Be Installed. Tap Continue, at the bottom of the screen. Make a call on your iPhone to check its cellular connectivity. If you can't make a call, contact your carrier. If the plan you activated replaces the plan on your physical SIM, remove your physical SIM. Then restart your iPhone. “
And after that it still says not supported?
Thank you Goran,
What the fix was is to install E-sim manually instead of through Koodo