Pre-ordered Heavsward CE, CE in-game items not mentioned?

[Niwashi]

So where do I put in the code for my digital collector's edition? In fact, where do I get it? green Man Gaming only gave me the code for what appears to bet he pre-order/Early Access, given that it's the only code I have.

The expansion hasn't been released yet. You should get the expansion's code (the Collector's Edition of it in your case) on or around June 29th. I expect June 29th will be the first day you can register those.

If yours is a PC version, you'll register it at the MogStation. If it's a PS3 or PS4 version, I expect those will be like they were for ARR, and have a PSN code to register at the PlayStation Store on your console.