Mass Effect 3 DLC EA Play

[DoctorDAM]

According to this reply on a similar thread, you can just login to Origin, and get the free DLC there.  You can then play on EA Desktop app.

Re: [PC] Mass Effect 3 Multiplayer DLC on EA App (EA Play through Xbox Gamepass) 

[2Guys1Creeper]

Cant access it at all on EA app