I think the same. I was trying to find the "How to install the server" but here is no option. It just saves the data in their servers. There is too many wording about security and control, but only in their control.
Self-hosting only without a backup node is currently unavailable
The self-hosting-only feature is not released yet. If you don’t want to use Anytype node and instead use p2p sync between your devices, you can block Anytype network traffic (Anytype & Anytype Helper) via your firewall.
From https://doc.anytype.io/d/data-and-security/data-storage-and-...