Both Estadio Azteca and Tottenham Hotspur Stadium appear in FIFA 19. I imagine having those assets already made for FIFA probably made it easier to make them work in Madden, as opposed to building new stadiums from scratch. That requires significantly more effort on EA's part; they send artists on-site to survey and capture reference photography, they have to model and light the stadium, optimize geometry to ensure the stadium gameplay, cinematic, and exterior shots both perform well in the game's graphics engine, etc.
It is disappointing that we aren't getting the Rams' / Chargers' / Raiders' new stadiums this year. I'd guess QB1 pulled a ton of art resources (notably for the face editor options and cinematic elements).