None of the dlc is showing up in the downloaded content menu? Any ideas?

Did you check under the "Installed Content" tab? It's easy to miss.

Yeah thank you I got that part all sorted out now. For some reason they didn't install. I used the galaxy client and verified game cache and came up with about 5g of missing files.

I've been having the same issue with 3 attempts at installing the game. I downloaded and installed all using Galaxy, (most recently with 1.1.12).

I checked all 3 tabs in the game's start screen for DLC and all were empty. "Other Campaigns" is greyed out.

I'm thinking it may be because I saw an "Invalid Command Line Switch" error after entering the admin password to allow it to install DirectX SDK.

I did try to verify, but when it went to install the above, I'd get the same error again and no DLC appearing in the list when I got ingame.

I did not have any other version of Dragon Age on my computer at time of install, but may have previously had one that I deleted (since it is in my Origins Library). I don't think I ever installed the Origins version of DA:O though.

Galaxy can either install directly, or be used to download the installers to let you install games yourself. I told Galaxy to download the installers overnight, so later tonight or tomorrow I will try the manual installation.

Edit: As I found in another thread, running the game with Admin permissions shows all the DLC.
Edit 2: This works even better, no need to run as Admin: https://www.gog.com/forum/dragon_age_origins_ultimate_edition/i_cant_see_any_dlc_or_the_other_campaigns_is_this_game_fully_drm_free/post9