I used the DLC code (which I believe was for the req pack and bonus armor) on an account on my Xbox One that I didn’t realize was logged in at the time, so I was wondering if the armor and skins will be available on all accounts/gamertags on the Xbox One? And if not, is there a way to transfer this because I have made a mistake…
Don’t call Xbox Support, they will tell you that they can’t help you and email you a link to these forums. 
Yeah, I figured here would be the place to ask lol. 