Apple is planning to equip all 2021 MacBooks with ARM-based CPUs designed in-house and it looks like this switch could also happen for GPUs. Currently, most AMD laptops come equipped with AMD dGPUs, but, starting with the 2021 MacBook models, we could see Apple solely using in-house GPUs derived from the A Bionic SoCs.
https://www.notebookcheck.net/Apple-might-completely-ditch-AMD-s-graphics-solutions-and-stick-with-custom-A-Bionic-GPUs-for-MacBooks-beyond-2021.480391.0.html
hope that ARM can compete in aggressive mode against two ancients colossals industries like AMD/iNtel
"We have seen a similar move with the Windows-on-ARM laptop initiative back in 2018"
You forgot about Windows RT in 2011