Endwalker digital, but started on physical

[Bearded]

Endwalker is not going to be released until November. If you have pre-ordered then you will have been sent a pre-order code that you can redeem on the Mog Station. When the actual release happens you will be sent another code to register the expansion itself.

To clarify - don't worry
As long as you have registered the pre-order you have several days of grace to register the actual game code from the release date to deal with any order issues with supper should they not automatically send out codes to all orders digital or otherwise.

To further clarify...
If in doubt - raise a ticket with support so you can get an answer from them directly.