Top up a delivered plan
A top-up adds data to an eSIM the supplier already delivered and marked as eligible. It does not create a second profile. Checkout is closed, so a top-up cannot be paid for yet.
When checkout is open, the top-up action sits on the order in your account, and only for a package the supplier marked as eligible. A plan that is only listed in the catalog cannot be topped up, because nothing has been delivered.