I order 2 sensors for the month, and do so about a week in advance.
Did your diabetes team send you a link for your phone to be able send all the data recorded by the phone or the reader? If not I think once you are on prescription they will provide that link to monitor all your data.
Did you have to register for an account with the L2? If so, use the exact same details to register an account on Libreview. Once registered you can see all the data recorded by your sensors. It's same system my diabetes team use to analyse the data from my Libre2.
If you have any questions ask your diabetes team on how to access all your data.