I understand your case I'm going through the same situation and it's very frustrating that you sign-in to get an eSim and the solution from their end is that you need to provide a sim card number, for them to help you. I've summited several tickets, ...
I'm currently chatting with a CS agent, I tried the following steps asked by them:1- Clear app cache/ delete and reinstall app2-Try in another deviceand at last they are telling that for helping me from their end I'll need to get a sim card (my head ...