GeForce Now is a game streaming service. It was previously possible to use it on deck, but Nvidia is making it much easier to install and get set up. They also recently improved gamepad navigation of their service.
To install, go to their install page in desktop mode and scroll down to the steam deck option. Download and run the script.
The advantage of streaming services like this is getting great performance on lower power devices, and minimal battery usage.
Speaking of, what browser do you use for this? I have tried Vivaldi but even in its default “trust me bro, I’m Chrome” user agent it says it’s not supported. Firefox says it’s supported but I got no stream and in the end I despise less Edge compared to Chrome so that’s what I’m using…