They are citing a 2001 Reuters “fact check” that was updated in 2022. She filed in 2023, listing her boyfriend as her spouse.
Her 2022 financial disclosure form (filed in August of last year) is here: https://disclosures-clerk.house.gov/public_disc/financial-pdfs/2022/10052480.pdf
Where did all the money go indeed. It’s not so different from the earlier forms. What happened to her salary? Eaten up by student loan payments?