As little as a purchase can be made with. An email address if you give one, the order details, the eSIM issued, your support messages, the data usage the network reports, and short-lived technical logs.
We do not collect your card number, your location, your contacts or the content of your communications. Buying needs no name.
The wholesale partner that issues your eSIM receives the order and the profile. They do not receive your name or your email.