The update getting ready for Phantom Liberty added a Steam Deck preset to get you playing immediately!

There’s a VESA mount if you want to put it on an arm.

There’s a large standoff so you can mount it on a wall next to a tv or monitor. I’ve seen these also used to mount directly to the back of a large monitor or in arcade enclosures at LAN parties as well.

You can attach a battery pack for more power while out.

I have a small Acasis dock I attach to give me more ports, an hdmi out, Ethernet in, and even has a room for a full-size m.2 drive. This makes much more like an ultra portable computer.

I also have xreal ar glasses and attach a Viture dongle so I can charge and use the glasses at the same time without it dangling. I got to protect that one usbc port.