[sthlmb]

It's a little bigger than what I imagine you're looking for, but the Radxa 5 ITX (not the ITX+) has 4 SATA ports, PoE+ (via a separate module), 2x2.5GbE, and the RK3588 SoC - I've been testing OpenMediaVault on it for the last couple of weeks and it's been pretty solid. If you're fine with M.2, the Radxa ROCK 5B+ has 2 M.2 M-Key connectors, the same RK3588 SoC, and PoE via a HAT bought separately.

Otherwise, there are dual NVMe HATs for the Raspberry Pi 5 but you'll be splitting a single PCIe Gen 2 lane across both drives (unless you go for the much more expensive HATs that have a Gen 3 PCIe switch on them to then share a single Gen 3 lane across them!)

[fiddlerwoaroof]

That looks about the right size, I think: my goal was to put it on top of my ubiquiti dream machine and directly wire it, but I’m limited in terms of power supply because of the number of outlets in the area.