That's 1.72 dual issue "fake" terraflops, for comparison the ROG ALLY and all it's Z1E competitors are 8.6 TF's by that metric. The single issue metric all the other consoles and Switch 1 uses would place it around 860Gigaflops, the dual issue compatibility may increase the real world performance roughly 20-30%. 561Mhz in portable is questionable for Samsung 8nm on the tiny battery compartment we've seen from the CAD files.
Steamdeck's 1.6TF is single issue, so Switch 2 portable at these clocks is roughly half the power, 0.86 single issue terraflops . The OP is quoting "fake" double counted flops, simultaneous FP16 and FP32 support. In practice dual issue only adds 15-30%, varying wildly by game, some games basically nothing, some games 30%. The ROG Ally is nearly 9TF's by this metric, or faster than the Switch 3 in 2033. This is their most generationally outdated and underpowered console in raw processing since the OG Wii, and is genuinely the old Switch Pro they rebranded as Switch 2 due to ballooning wafer shortages and prices. 1Ghz docked mode would be 1.5TF's by all the other console's single issue TF ratings, roughly between base Xbox One and base PS4. Supporting dual issue and the "newer" circa 2019/2020 Nvidia cores should push docked mode closer to base PS4, with DLSS likely upscaling a native 900p-1080p render resolution to 1440p.