She remains in custody, and a news network released an image, apparently showing her in a pre-trial detention center.
Per the Telegram-based news channel SHOT and News.ru, the social media influencer, who is seven months pregnant, had asked a court to transfer her to house arrest.
But she was refused this request.
Officers consider her a flight risk, as she holds a UAE residence permit.
A branch of the Moscow City Court ruled that she could remain in custody until November 15.
The unnamed “acquaintance” told police Fedyakina tricked him into handing over some $70 million.
But officers reportedly think Fedyakina, a 28-year-old originally from Ukraine, embezzled this money.