how is early access going to work?

[Kamatsu]

Only those that got the game digital more then likely have the 2nd code. Only those with physical have to wait.

Probably only those who have the game through Steam have the CD-Key for Shadowbringers already (assuming digital orders here) - as it seems those who pre-ordered via SE store only have the early access key.

I'm a Steam XIV user and have both the early access key as well as the full-product CD-Key. Obviously can only activate the early access key (which I already have obviously) till they enable activating the full key.