Well yes and no. For one there is lots of metadata like access times, the IPs that connect and their locations, traffic amount, etc.
But also like with all “cloud solutions” you are just outsourcing your uptime reliability issues. And for a system like that, im not sure outsourcing that is a great idea.
It looks like it will be on prem, but then i dont even understand why they would involve amazon at all? Just use the existing public solutions. As soon as any major part of a system that is connected to the internet has proprietary code in it, you cant really trust it to protect secret information anymore.