Are you not seeing the option when you're going through the website? I'm seeing we still have plans for tablets. Have you gotten in touch with our Care folks to see if we can get you activated over the phone?
I was able to geat the iPad activated by calling in to get the T-Mobile One Tablet plan. There was some difficulty with activation as the folks that I talked to didn’t know what an e-sim was and how to activate the tablet over the phone.
I gave them the CSM number from the e-sim and asked them to try and enter it into the system where they would have normally entered the ICCID of a physical sim. Once they did this, the tablet activated successfully without having to have a physical SIM card mailed. This also helped avoid the $25 sim-card charge.