You can plug all that stuff into iPhone and Android phones too, but very few people are excited about it. Samsung even made a laptop shaped accessory for their phones, I can’t find it but this company is making something similar: https://nexdock.com/samsung-dex-laptop/

I don’t think the power rangers transforming phone product is a good product for most people. If you asked me to choose between a regular M3 MacBook Pro and a full DeX phone based docking setup built around a top-line smartphone, I’m going to pick the MacBook’s 4x more RAM, 3x bigger CPU, 6x bigger GPU, and much better thermal dissipation. Why settle for a much less powerful device that is fiddly and annoying to “set up” for real work?

I also have a Steam Deck and the only thing I’ve ever plugged it into is a power adapter. If I was gonna plug it into a monitor, I’d use my vastly more powerful desktop PC instead.