To note, the console is one thing and the chip is another. I do want to see the console, but the chip that grants it its performance is as understood as it gets.
we know the chip but not the clock speeds.
so the docked performance of the GPU can be anything from 2 TFLOPS all the way up to around 3.9 TFLOPS
in handheld mode we will probably see 1.x TFLOPS to keep battery life in check. but thanks to DLSS, you can probably get away with rendering internally at 480p and then reconstruct to the display resolution.
I'm currently playing Gori: Cuddly Carnage on Steam Deck OLED, and thanks to XeSS I am able to render internally at around 480p, upsample that to the 1280x800 resolution of the screen, and play the game on high settings at 60fps. with raytracing at around 30 to 40fps, and it still looks really decent on that smaller screen.
and DLSS is better than the DP4a version of XeSS I'm using in that game