The hype for that album died faster than her last solo number one which was 9 years ago.
She shares an Oscar with Mark Ronson and other 2 or 3 producers for the Shallow song.
Stupid Love was just #5 at Billboard Hot 100 and died really fast, Rain On Me went number one because of Ariana's power. She got the ASIB hype at her side, so Chromatica should have been much more popular than it ended up being. Even Future Nostalgia is doing better than Gaga's last album.
Gaga can't surpass Madonna's legacy because Madge's a star of her own. She didn't needed to do a remake of a popular movie. Her political acts and her discography made her legendary.
Gaga's last iconic album was almost a decade ago, when she had a 3 years old career.