AMD makes the chips for those companies and it comes out of their wafer allocations. Even the original contracts were AMD supplying finished chips. That means consoles fight for the same wafers as everything else and dGPUs come last. Nvidia for many years has supplied far more dGPUs to OEMs,and unless AMD can supply enough chips they will continue to not have a lot of marketshare.
Most PCs sold in the world are prebuilt systems. This is why I prefer AMD concentrates on the mainstream market and actually build decent dGPUs that can make it into prebuilt systems. They also need to work more on the software side,ie, as shown by the RX7900M which had buggy drivers leading to high idle power consumption.
Instead they concentrate on large,overly complex designs,which cost too much to make, which unless they take the performance crown from Nvidia,are a waste of money IMHO.The self built PC market is too fickle.
This is why the RTX3060 and GTX1650 are in the top 5 - so as much as everyone talks about RTX4090,those are the bread and butter consumer dGPUs for Nvidia. The RX6600 should have been that,but the supply was not simply good enough and it launched late.
I hope with RDNA4,they properly integrate things in their laptops to provide a package for OEMs to sell. Its annoying that AMD laptops are selling RTX4060 dGPUs!
They need volume to sustain RTG. Even @
KompuKare has talked about this.
ATI even when it had subpar series such as the HD2000/HD3000 series,they supplied a lot of dGPUs for prebuilt systems. This is why their marketshare was still above 30% IIRC.
The agreement with Samsung is licensing where they build their own chips at their own fabs. I am hoping they can try and build commodity dGPUs using Samsung because TSMC is overbooked currently.