I tried CP2077's Deck mode but it really seemed like a tech demo level of "you could do this if you really wanted to" more than it actually being playable.
The game felt like it had significant input lag, and at 720p with upscaling text becomes very hard to read. The game's visual style of "glitch" effects also translates badly with upscaling and I really had a tough time actually understanding what I'm looking at on the screen.
I thought it was playable on the LCD Deck. I did turn things down below what the Steam Deck preset was at. It certainly wasn't the smoothest 100% of the time but it was better than Fallout New Vegas on a PS3 IMO. It still holds up pretty well against the Switch 2 version in handheld mode.
The game felt like it had significant input lag, and at 720p with upscaling text becomes very hard to read. The game's visual style of "glitch" effects also translates badly with upscaling and I really had a tough time actually understanding what I'm looking at on the screen.
Perhaps the situation is better on OLED.