https://wccftech.com/amd-smartshift-technology-one-ryzen-4000-renoir-laptop-2020-more-variants-coming-2021/

One of the key technologies of AMD's Ryzen 4000 Renoir APU family is SmartShift which enables CPU & GPU to shift power dynamically based on the workload. Laptops with this technology can either get higher gaming performance by delivering more power to the GPU or increased content creation performance by increasing power limits for the CPU. However, this sought after feature of AMD's Ryzen 4000 laptops is kept exclusive to just a single laptop for the entirety of 2020.

AMD's Chief Architect of Gaming Solutions, Frank Azor, in a recent tweet revealed that since the technology is new at this point of time, the adoption rate has been lower but credit is given to Dell for adopting it in its Dell G5 15 SE notebook which features the Ryzen 9 4900H CPU & a Radeon RX 5600M GPU.