Question about Samsung Galaxy S21 Ultra (Snapdragon)

The device has dual SIM, so you can actually insert two physical SIM cards. No e-SIM support.

As Lugi1995 has already correctly said, the phone is not eSIM-enabled.

This is an import device, as Samsung does not normally sell the Snapdragon variants in Europe, but only in specific regions such as the USA. The website refers to the Exynos models, not those with Snapdragon.

So the eSIM will most likely not work.