Prior versions of Cinebench do have a GPU test (separate from CPU test) but I do not believe R23 does, at least not yet.
iGPU benchmarks I have not seen much of yet. Anything can beat Intel's 620 for example, but I would be curious to see how to does vs AMD's old Vega architecture on the Ryzen 4000 series.
Give it a few days and I bet there will be a lot more info to look at. Seems like today is when the review embargo lifted.
Or wait 1-2 months for Ryzen 5000 mobile to land with the Zen 3 cores with another ~20% improvement on top of the earlier charts.