Yeah I suspect that the issue is between Samsung Canada & some kind of arrangement / agreement with the Canadian Carriers. Clearly it's not a hardware issue as your phone definitely is capable of using E-SIM.
Maybe Apple has paid enough money to the Canadian Carriers to block Samsung from using E-SIM. Call me skeptical lol.
Hi, unfortunately, Samsung mobile devices don't support ESim. ESim availability may vary depending on country and carrier.
Please find the link to find the specifications for Galaxy Note 20 Ultra 5G: https://www.samsung.com/ca/smartphones/galaxy-note20/specs/