Can a Dell Alienware Aurora R13 use two m.2 SSD drives?

Although it has two M.2 slots, one of them seems to be a short model (2230 as opposed to the other's 2280). The NVMe Disk's I'm aware of all have 2280, or maybe 2260 sizes, so the 2nd NVMe disk probably wouldn't fit in. Also, it seems that the 2nd M.2 slot is mainly meant for WiFi & Bluetooth (or combined) adapters.

The link below shows you some details on the Mainboard:
https://www.hardware-corner.net/desktop-models/Alienware-Aurora-R13/

Of course there are PCI-Express Adapters on which you can insert NVMe disks.

I'm not sure I trust that hardware-corner.net website. It says the m.2 connectors use PCIe 3.0.

The R13 has three m.2 connectors - 2 SSD and one Bluetooth/WiFi. Items 4, 7, 15 on the motherboard figure below, from Dell's Specifications and Installation document. The specifications document say the m.2 SSD slots use PCIe Gen 3 / Gen 4 up to 64 Gbps. The service manual shows instructions for removing and installing a 2230 or 2280 SSD from both SSD slots.

I am hoping someone has practical experience of having equipped two SSDs and how it did or did not work.

This sounds extremely promising. The ability to use two NVMe PCIe 4.0 SSDs is the only concern I had with the Aurora R13.

Since Dell cannot sell the machine with two SSDs (!), I think that I probably will order the R13, buy a Samsung 980 Pro 1TB or 2TB SSD, and add that SSD to the computer.

It's slightly less painful in US dollars these days but still not cheap.