Dragon Age 2 DLC on PC? [no spoilers]

I've been playing DA2 on the EA app, the replacement for Origin. I've just realized that the version I'm playing doesn't seem to include the DLC, so I went looking for it. All I've been able to figure out so far is that there isn't any way whatsoever to get it via the EA app.

I've seen that most (or all?) of the DLC for older games like DA2 was made free on Origin when they shut down Bioware Points. But it's not for sale on the new app, and there's no way to add it to the game. I've found download links for installers from EA Help (https://help.ea.com/en-gb/help/faq/dlc-for-classic-games/#dragonage), but after installing with those, the DLC shows up in the menu (saying it's unauthorized) and can't be started in-game.

Has anyone gotten the DLC to work since the shutdown of Origin?