My Endwalker expansion has gone?

I tried logging in this morning and my splash screen was changed to Shadowbringers... But I beat Endwalker a couple nights ago... which should be evident from the fact I have a lvl 90 red mage.

The first attempt at logging in placed me in a queue which ended with me getting the error code 3054... then when I tried to get myself back in I got stuck in a never ending loading screen.

Checked Mogstation and my Endwalker license is gone!?

Am I going to have to do MSQ all over again!?

Your licence is not gone, the code you've previously enter is the one for the earlier access, you need to enter the actual EW code.
If you bought EW on the SE store, on the order history you'll have the second code.

More general info on https://na.finalfantasyxiv.com/lodes...3bbe33e8b7ca08