Sorry to hear about your saves @Grotaiche I feel like I've made things worse for you.
Holger1405 is right about DLC dependant saves, but from what I gathered all you previously own DLC are installed - am I correct? In such case I would first check if reinstalling the game didn't change any antivirus privileges blocking some folders. Also do creating a new 'testing' save and then restarting the game (EA App even) lets you load that 'testing' save?
When it comes to DLC I'm out of ideas - they should be there according to all signs. And right now you can't buy them via EA App, because for EA they are part of base game.
Don't worry, it's not your fault, most probably EA's 🙂 Now to answer your question, yes all the DLCs are own are shown there.
HOWEVER when trying to reinstall ME3 today, I was hit by the "can't download Rebellion pack" issue which I've just upvoted. So now I can't even reinstall ME3. This EA app is a train wreck.
