Meanwhile, two men were charged with theft and criminal conspiracy in October after officials said they had "partially recognised" their involvement in the heist.
The heist happened when the group of four men used a stolen vehicle-mounted mechanical lift to gain access to the Galerie d'Apollon (Gallery of Apollo) via a balcony close to the River Seine, Beccuau has previously said.
The men used a disc cutter to crack open display cases housing the jewellery.
The thieves were inside for four minutes and made their escape on two scooters waiting outside at 09:38, before switching to cars.
One of the stolen items - a crown - was dropped during the escape but eight other items of jewellery - including an emerald-and-diamond necklace that Napoleon I gave his second wife, Empress Marie-Louise - were taken.
Beccuau has said the heist was carried out by petty criminals rather than organised crime professionals.
Shortly after the theft, it was revealed by the Louvre's director that the only camera monitoring the Galerie d'Apollon was pointing away from a balcony the thieves climbed over to break in.
The president of the Louvre, Laurence des Cars, has since admitted the museum had failed in its responsibilities, but denied that security had been overlooked - saying that from the time she took office in 2021 she had been warning constantly of the need for more investment.
Since the incident, security measures have been tightened around France's cultural institutions.
The Louvre has transferred some of its most precious jewels to the Bank of France following the heist.