The Odroid H4+ might be what you're looking for. It's a N97 SBC from a South Korean manufacturer that's been around a while. The "+" variant has 4 SATA ports. With an adapter board, 2-4 NVMe drives can be attached as well.
Odroid themselves sell simple cases for the H4+ like the Type 3 that can hold several drives if you don't mind the homebrew look. They also sell a mini-ITX kit that makes the board compatible with a mini-ITX case of your own choosing.
