We are waiting for that for 15 years already.... But we can only buy an AMD Fusion product in a console.
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I Would buy an ultra efficient monolith designed APU with capable 3D performance for online competetive games on low settings with 144fps performance.
But they kill their APUs with their own market policy. A Cheap CPU + any cheap dGPU with a similar budget limit can provide also high efficiency but much more 3D performance.
(For example a GTX 1650 + i3-12100F/R5-3600 is just a "little more" money than a 5600G. CPU+dGPU is +50% more money than an 5600G itslef, but CPU&dGPU combo gives +100% - 200% 3D performance, while an 12100F and a GTX 1650 is still have a very good Performance/watt efficiency.)
I would expect a real AMD Fusion: Like They should design an AMD APU with more CU with Quad Channel DDR5 controller + MOBO brands should produce APU specific motherboards with 4 channel DDR5 with max. ~90-120W VRM capacity with high efficiency and only 1-2 PCIe x4-x8 slot need for upgrade (like Sound card for players/HTPC or drive controller+10G LAN for NAS, etc...). No need PCIe 4.0/5.0 x16 for dGPU in this case.
Only very expensive manufacturers make something similar (like minisforum), but their disadvantage is the price.